Ok so I'm gonna give you some options!

User - a creator with a demon in her soul underfell

Classy - A part cat undertale

Becca - an edgy lil bitch underfell

Swappy - an innocent bean, part wolf underswap

Mafia - A strong, brave woman who was raped when she was young Mafiatale

Lucks - a slutty bitch, what more is there to say? Underlust

Bria - an insane canable who is also a demon horrortale

Bree - an insane, canable demon like Bria but takes pills to calm herself horrorfell

Zora - a brave skeleton who doesn't take shit from anyone. Oldest twin of Swappy and Echofell Sans underswap and echofell

Damien - the youngest twin of Swappy and Echofell and, unlike his sister, is a part wolf  underswap and echofell

Noel - a kind skeleton who has a bravery soul. Extremely strong like her parents, underswap papyrus and Zora underswap and echofell

Gen - a woman who escaped her au's genocide with only a scar across her torso aftertale

Stary - a hyperactive, happy girl who giggles a lot outertale

Esme - A lusty child, the result of Lucks raping Becca underfell and underlust

Luna - the result of when her mother (mafia) was raped. A strong yet kind girl mafiatale

Brae - the insane, canable, demon child of Bree and Bria horrortale and horrorfell

Emma - the oldest daughter of Becca and undertale Papyrus. A kind and strong girl, not liking killing like her father underfell and undertale

Roman -  A brave, childish child of becca and Undertale Papyrus. Says nyeh heh heh a lot like his father underfell and undertale

Lillith - a girl from dusttale, terrified of her own Frisk and Sans dusttale

Ruby - the child of Chara and User. (Don't ask xD) an extremely determined girl who is also creative, pretty genocide and part demon underfell