Chime

One of Ecclesiastes' two familiars that they say they created out of their own magical power (and the cats back this up, so can you really argue?).  They can summon Chime with a snap of their fingers, and he usually helps with anything Ecclesiastes can't do alone, such as reconnaissance, assisting with a ritual, or you know, just doing the chores around the house.  He also has some mild arcane abilities of the "quadruped telekinesis magic so he can hold things like a biped with opposable thumbs" variety, and all three can communicate with each other mentally.  It's unknown where the cats go when they aren't summoned, and they don't comment on this beyond saying they're "around."  

Chime is the bright green, sassier, more energetic one of the two, who gets up to typical catlike mischief.  Of course, his and his sister's biggest target to dunk on is Ecclesiastes themself, which is probably something you could psychoanalyze for hours if you see them as a hivemind.

According to Ecclesiastes, they're cats because...they like cats.  Interesting!!

A roleplay character, and thus can work in a variety of settings, even without Ecclesiastes.  Familar hijinks are preferred, but not required.  He could just be a magical cat!