Does anybody know who this character is?

I think it's A.B.A but I'm not sure

It's Valentine. She's from the new guilty gear that comes out at the end of the month.

She's Justice's clone.

More or less...though I think you saying that counts as a spoiler. Looking at this again and having played the game...i'm wondering, should we actually use a tag for her balloon? he does actually have a name.

Whoops, my bad

Its Valintine She is from Guilty Gear Overture the game