Last updated: April 23, 2026· By Seckin Peker

Costume Guide

Diego Hargreeves Costume Guide
The Umbrella Academy · David Castañeda · Netflix

The brooding knife-thrower of the Hargreeves family — all black, all tactical, and always ready. Seven pieces of vigilante precision.

The Umbrella Academy TV Series
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Quick Answer: To dress like Diego Hargreeves from The Umbrella Academy, put on the black long-sleeve workout shirt, add the black tactical pants, strap on the tactical chest rig, put on the superhero mask, pull on the tactical gloves, place the throwing knives in the chest rig, and wear the black tactical boots. The chest rig and mask over the all-black base immediately communicate the character, and the throwing knives are the detail that makes the costume unmistakable.

Diego Hargreeves is the second sibling of the dysfunctional Hargreeves family at the centre of The Umbrella Academy, the Netflix superhero series based on Gerard Way and Gabriel Bá’s comic books. Played by David Castañeda, Diego is the team’s brooding, self-styled vigilante — a knife-throwing fighter with the superhuman ability to curve any thrown object mid-flight. His all-black tactical aesthetic, chest rig, and ever-present throwing knives make him one of the most visually striking members of the Hargreeves ensemble, and his costume is one of the most complete and immediately readable character builds available from the series. Seven pieces, all black, one deeply stubborn knife enthusiast.

Items Total7 Items
DifficultyEasy
ShowNetflix
ActorDavid Castañeda
Diego Hargreeves costume guide infographic from The Umbrella Academy showing black tactical pants, chest rig, superhero mask, black workout shirt, tactical gloves, throwing knives and black tactical boots

Diego Hargreeves Costume Items — The Umbrella Academy

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Diego Hargreeves Umbrella Academy Halloween David Castañeda
  • 1 Black Tactical PantsAll-black tactical trousers — the base layer of Diego’s vigilante outfit
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  • 2 Black Tactical Chest RigWorn over the shirt — the most character-defining piece of the costume
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  • 3 Superhero MaskBlack eye mask — Diego’s Hargreeves vigilante identity marker
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  • 4 Black Workout ShirtLong-sleeve black compression shirt — worn under the chest rig
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  • 5 Black Tactical GlovesHard-knuckle combat gloves — worn throughout the series
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  • 6 Throwing KnivesDiego’s signature weapon — the prop that makes the costume unmistakable
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  • 7 Black Tactical BootsHeavy-duty lace-up combat boots — character-accurate footwear
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Diego Hargreeves Halloween costume styling reference from The Umbrella Academy showing the full all-black tactical outfit with chest rig and superhero mask

How to Style the Diego Hargreeves Costume

Start with the black long-sleeve compression workout shirt as the base layer — it should fit close to the body and be tucked into the tactical pants rather than left loose. Pull on the black tactical pants next, ensuring they sit correctly at the waist with the cargo pockets accessible. The all-black base layer is the foundation of Diego’s vigilante look, and getting both pieces fitted and clean before adding the chest rig makes everything else sit better.

Strap on the black tactical chest rig over the shirt. The chest rig is the costume’s most character-defining piece — it immediately transforms the all-black outfit from generic tactical wear into Diego Hargreeves specifically. Adjust the straps so the rig sits flat and high on the chest, and load the throwing knives into the available pouches and slots. The knives should be visible and easily accessible rather than fully concealed. Add the black superhero mask over your eyes — it can sit on the face throughout the event or be pushed up onto the forehead for moments where a clearer face shot is preferred.

Pull on the black tactical gloves — both hands, worn throughout. The hard-knuckle design references Diego’s combat-oriented fighting style and adds a genuinely tactical texture to the silhouette. Finish with the black tactical boots, laced fully and worn with the tactical pants either tucked in or sitting over the top of the boot shaft — both options are character-accurate from different moments in the series.

In character, Diego operates with intense physical confidence and a deep, stubborn conviction in his own sense of justice. He is the sibling most likely to act first and explain later, the one who stayed in the city working as a vigilante while the others went their separate ways, and the one who carries the most complicated relationship with his father’s expectations. He doesn’t speechify — he moves, reacts, and commits to action. Handle the throwing knives with casual familiarity, as someone who has been using them since childhood and doesn’t think twice about it.

The Chest Rig Is the Costume

The black tactical chest rig worn over the compression shirt is the single piece that communicates Diego Hargreeves most immediately. Without it, the all-black outfit could be any tactical character. With it — especially combined with the superhero mask and throwing knives — the character is unmistakable to any Umbrella Academy fan. Adjust the rig so it sits flat and high, and keep the knives visible in the pouches for maximum effect.

The Throwing Knives

The throwing knives are the costume’s most important prop and the detail that communicates Diego’s specific power set at a glance. Store them in the chest rig pouches and handle them with practiced ease throughout the event — Diego uses his knives with the effortless familiarity of someone who has spent years training with them. The knives do not need to be thrown; simply having them visible and accessible in the chest rig is enough for immediate character recognition.

All-Black Cohesion

Every piece of this costume is black — compression shirt, tactical pants, chest rig, mask, gloves, and boots. The visual cohesion of the all-black silhouette is part of what makes Diego’s look immediately distinctive within the Hargreeves ensemble, where each sibling has a completely different aesthetic. Ensure all pieces are clean, dark black rather than faded, and that the different textures — compression fabric, tactical nylon, leather gloves, combat boots — read as intentional rather than mismatched.

The Mask Positioning

The black superhero mask works in two positions: directly over the eyes for the full vigilante Diego look, or pushed up onto the forehead for the between-mission casual version. Both positions appear in the series. For photos, the on-face position creates the strongest and most recognisable silhouette. For extended conversation or events where facial expression matters, the pushed-up position keeps the mask visible as a costume element while keeping your face fully visible.

Physical Presence

Diego is one of the most physically expressive members of the Hargreeves family — his character reads through posture and movement as much as through dialogue. Stand with weight slightly forward, arms relaxed but ready. When someone approaches, assess them before speaking. Move with the easy confidence of someone who has trained for combat since childhood and is entirely comfortable in their body. Diego doesn’t fidget; he observes, evaluates, and then acts with complete commitment.

Gloves Throughout

Diego wears his tactical gloves consistently throughout action sequences and many regular scenes in the series — they are part of his identity as much as the chest rig and mask. Keep the gloves on throughout the event rather than removing them for comfort. The hard-knuckle design adds tactile character to every interaction and immediately communicates the fighting-oriented nature of the character to anyone who notices the detail.

Diego Hargreeves Group & Couple Costume Ideas

Same Show Couple

Diego & Lila Pitts

Diego’s love interest and the most formidable fighter he encounters — Lila Pitts’s eclectic, adaptable wardrobe against Diego’s all-black tactical precision. Lila is a Commission-trained assassin who can mimic any Umbrella Academy power she witnesses, making her simultaneously Diego’s most dangerous opponent and his most compelling match. The pairing generates strong recognition from fans of the later seasons and captures one of the show’s most dynamic and combative romantic relationships.

Diego Hargreeves Lila Pitts

Sibling Duo

Diego & Luther Hargreeves

The two most physically combat-oriented Hargreeves siblings — Diego’s all-black tactical vigilante aesthetic against Luther’s imposing frame and team-leader wardrobe. Their relationship is defined by a competitive tension that runs through the entire series, each convinced the other is doing the family mission wrong. Two completely different physical types and aesthetic approaches united by a shared childhood of extraordinary ability and profoundly imperfect parenting.

Diego Hargreeves Luther Hargreeves

Antagonist Pair

Diego, Hazel & Cha-Cha

The Commission’s two most reliably lethal field agents facing off against the Hargreeves family’s most combat-committed member — Hazel and Cha-Cha’s matching cartoon animal masks and professional assassin suits against Diego’s all-black vigilante precision. The trio captures the first season’s central action dynamic and creates a visually arresting costume group that immediately communicates the show’s specific tone of darkly comic ultraviolence to anyone familiar with The Umbrella Academy.

Diego Hargreeves Hazel Cha-Cha

Full Ensemble Group

The Hargreeves Siblings

Diego alongside the complete Umbrella Academy roster — Vanya, Klaus, Number 5, Allison, Luther, and Ben — is one of the most recognisable and visually cohesive ensemble Halloween concepts from any current streaming series. Each sibling’s distinct aesthetic communicates their individual personality and power set at a glance, and Diego’s all-black tactical look anchors the group’s action-oriented identity. A group concept that rewards every level of Umbrella Academy fandom.

Diego Hargreeves Vanya Hargreeves Klaus Hargreeves Number 5 Allison Hargreeves Ben Hargreeves

Handler & Agent Trio

Diego, The Handler & Grace Hargreeves

Three of The Umbrella Academy’s most formidable women-adjacent character dynamics — Diego’s tactical vigilante against The Handler’s sharp retro-corporate power wardrobe and Grace Hargreeves’s pristine domestic android elegance. Three completely different visual identities from the same show, each communicating their character’s specific role and temperament immediately. A group that rewards fans who know the show’s full range of characters beyond the Hargreeves siblings themselves.

Diego Hargreeves The Handler Grace Hargreeves

Chaos Duo

Diego & Klaus Hargreeves

The Hargreeves sibling who is always in a fight and the one who is always somewhere else entirely — Diego’s disciplined all-black tactical precision against Klaus’s maximalist, eclectic wardrobe and otherworldly commune with the dead. Two completely opposing approaches to the same dysfunctional upbringing, rendered as a visually striking pair. Their dynamic across the series alternates between genuine warmth and mutual bafflement, and as a costume pair they generate immediate recognition from any Umbrella Academy fan in the room.

Diego Hargreeves Klaus Hargreeves
Diego Hargreeves group and couple costume ideas reference from The Umbrella Academy showing the full all-black tactical outfit with chest rig, mask and throwing knives

DIY vs. Store-Bought Diego Hargreeves Costume

Build Strategy

The Diego Hargreeves costume is one of the most practically wearable character builds from any current streaming series — seven pieces, all in black, built around a clear tactical-vigilante aesthetic that is comfortable for an evening of Halloween wear. The chest rig and superhero mask do the character recognition work on top of the all-black base; without them, the outfit is generic tactical wear. With them — especially combined with the throwing knives — the character is immediately identifiable. Unlike many character costumes, this build has no single expensive anchor piece; the cost is distributed across seven relatively affordable tactical and athletic items. Total build cost typically runs $60–$120. Many people will already own suitable black compression shirts or black combat boots, reducing the effective cost further.

  • Chest rig + mask = the combination that makes the costume character-specific
  • Throwing knives = the prop that communicates Diego’s power and identity
  • All-black across all pieces = visual cohesion is essential
  • Total: $60–$120 — check wardrobe first for black shirt and boots

Priority Piece Order

The black tactical chest rig is the first purchase that makes this costume character-specific — it is the piece that most immediately communicates Diego Hargreeves rather than a generic tactical outfit. The superhero mask follows as the second priority, completing the vigilante identity. The throwing knives are the third priority — the prop that communicates the character’s specific power set and makes the costume genuinely memorable to any Umbrella Academy fan. The black tactical pants and black workout shirt are foundational pieces that many people will already own in suitable form; check your wardrobe before purchasing. The black tactical gloves and boots follow in priority, completing the head-to-toe all-black silhouette.

  • Tactical chest rig = first priority — makes it Diego, not just tactical
  • Superhero mask = second priority — completes the vigilante identity
  • Throwing knives = third priority — the character-defining prop
  • Black shirt, pants, gloves, boots = check wardrobe first before purchasing

Diego Hargreeves Costume — Frequently Asked Questions

Diego Hargreeves wears a full all-black tactical outfit — black tactical pants, a black long-sleeve compression shirt, and a black tactical chest rig worn over the top. He wears a black superhero mask, black tactical gloves, and black tactical boots. His signature weapons are throwing knives, carried in the chest rig and used with superhuman accuracy. Every piece of his costume is black, creating a consistent and immediately recognisable vigilante silhouette.

The black tactical chest rig is the piece that transforms the all-black outfit into Diego Hargreeves specifically — without it, the look is generic tactical wear. The superhero mask completes the vigilante identity. Together, the chest rig, mask, and throwing knives communicate the character immediately to any Umbrella Academy fan. The throwing knives are the costume’s most important prop because they communicate Diego’s specific power set at a glance.

Diego Hargreeves is played by David Castañeda in The Umbrella Academy Netflix series. Diego is the second Hargreeves sibling — a brooding, combat-trained vigilante with the power to curve the trajectory of any thrown object. Castañeda’s performance captures Diego’s intense physicality, his deep need to prove himself on his own terms, and his complicated relationship with both authority and family loyalty throughout the series.

Diego Hargreeves can curve the trajectory of any object he throws mid-flight — most notably his throwing knives, which he can redirect to hit targets at otherwise impossible angles. He is also an exceptional hand-to-hand fighter and can hold his breath indefinitely, a secondary ability revealed in the series. His combination of physical training, tactical intelligence, and knife mastery makes him one of the most formidable combat members of the Hargreeves family.

Yes — seven pieces, all black, with the chest rig and mask doing most of the character recognition work over the all-black base. The costume is also exceptionally comfortable for an evening of Halloween wear; all the pieces are practical athletic and tactical gear rather than restrictive costume elements. Many people will already own a suitable black compression shirt and black boots, reducing the effective purchase count. Total build cost typically runs $60–$120.

Lila Pitts is the most character-specific pairing — Diego’s love interest and fellow Commission-trained fighter. Any of the Hargreeves siblings work as group additions, with Luther being the most natural sibling duo given their competitive dynamic throughout the series. For a larger group, the full Hargreeves siblings ensemble — with each sibling in their individual aesthetic — is one of the most recognisable and visually cohesive Halloween group concepts from any current streaming series.

Diego speaks with physical confidence and stubborn conviction. Effective in-character approaches include: making tactical assessments of any social situation, volunteering immediately for anything involving combat, and handling the throwing knives with practiced ease rather than theatrical flair. Diego’s defining quality is that he acts on instinct and principle rather than strategy — he commits to a decision completely and deals with the consequences after. Zero hesitation, occasional regret.

Diego Hargreeves is one of the seven main characters in The Umbrella Academy, a Netflix superhero series based on the comic book series by Gerard Way and Gabriel Bá. The show follows the dysfunctional Hargreeves siblings — seven children with extraordinary powers adopted by eccentric billionaire Sir Reginald Hargreeves — as they reunite to prevent apocalypses and navigate their complicated family dynamics across three seasons.