Chaos (later turned into Chaositty) was originally... a self insert sonic fanchar. I made her when I was five, whatevs. She basically looked like the one on the left, soooooooo.

I went 'hmm' at her maybe being still around in some form? I think I'll consider the yellow one an au version of her, sorta my take on modernizing her.

She wears clothes now because for some reason female sonic furries have to? And I'm thinking maybe she's like. An alternate universe version of Knuckles, sort of like how Blaze is an alternate version of Sonic and Knuckles, but I doubt from that same dimension.

Shrugs her dimension collapsed and she got trapped in the current one and has a sibling like relationship with Knuckles, voila.

Poor Chaositty must be so upset, as all she wants is to be close to her idol Knuckles.

god who cares this much about sonic ocs in this day and age

me

i do