Easy Couples Costumes - 13 Halloween Costume Ideas
These are the couple costumes on CostumeRealm where the two halves actually depend on each other. Alone, Rachel doesn't make sense without Ross standing next to her. Bonnie needs Clyde. That's the point of a couple costume, it should look incomplete without the other person.
The honest downside: couple costumes only work if both people actually show up in costume. One person fully committed next to someone in jeans and a t-shirt reads as one person cosplaying alone, not a couple costume. Make sure the other person is actually in before buying anything.
Most of these fall apart without both people. Pick one where your half still works as a standalone costume, like Ed Warren, before committing to the pairing.
Yes, none of these require an actual romantic relationship to make sense visually.
More than solo costumes since it's two outfits, usually nine to thirteen combined, but still built mostly from normal clothing plus a couple of accessories.