Momo started off as a self insert for shenanigans back with my bestie and I was super into Sonic back then. After a while, I started to build her into the kind of character I wanted to see. Most of my inspiration for her was shonen anime and I used to always want Shonen Protagonist But Girl (my limited exposure was just all the shit I watched on toonami lmao) so eventually that's the direction I started to take her in
Despite me making her and more OCs in Sonic-verse, the lore that I developed for her and them became less associated with that universe and self containable as I worked on stuff with my friends mostly.
Solaire, a demon that was punished for her hubris by being banished to the sun, ended up bound to Momo via an accident in her father's lab where he was trying to pull UV rays directly from the sun. The very essence of Solaire's existence poured into her, and after Momo suffered a few comas and hazardous accidents growing up, Solaire would become powerful enough to seperate from her and be "reborn" into a duplicate body. Both of them were still bound by a seal that'd be finally broken years later, an ordeal that nearly kills Momo.
Despite All Of That she's always been a carefree but short tempered girl who likes a really good fight and junk food
I haven't done anything with her in a long while, but the current arc of her "story" is adapting to newfound strength of just Being Herself and not having her identity attached to a curse or a demon, whereas she lost a majority of her life to a struggle she never asked for
Here's her toyhou.se profile