Day 1: Leo (Pandora Hearts)
Pumpkinziggy and I definitely saw you! xD She was all over the PH panel and photoshoot, and she took tons of pictures... (She was Hanji from AoT for those.) I don't know if she's going to post them anywhere, though.
As for me...
Day 0: Alma Karma (D.Gray-man)
Day 1: Sasha (Attack on Titan)
Day 2: Alma Karma (D.Gray-man)
Day 3: Alma again, for most of the day, but was Gakupo (Vocaloid) for the evening.
Day 4: Kamui Gakupo (Vocaloid)