DAY 1: Tess
Formerly named ‘Tesserax’ and also named ‘Tessrane’ when I made a version of her in the now-defunct City of Heroes/City of Villains MMO. She’s a teleporting Chesire cat-like creature with a love for trickery and being rude. Her game avatar equivalent could also summon shadow soldiers and inflict poison on to enemies; I might keep some of that for her powers.