Ermes Costello

Ermes is one of Jolyne Cujoh's main allies. She is very prideful and loyal, preferring to act and think later.

She purposely ended up in jail to avenge the death of her elder sister Gloria.

Whilst in Green Dolphin Street Prison, she acquires a Stand which she names 'Kiss' which allows her to place 'stickers' on items to duplicate them, but once the sticker is removed the two items smash together violently.