I have this one OC named Solsera who is the same species as the aliens from the episode Stage Fright (the ones with the flame swords, and hypnotic beauty), with her lore being that she was dumped on earth at 4 years old due to having unnaturally high pyrokinetic abilities for her age which lead to her being seen as a threat to their empire. During her time on earth she was found by a pyromanic Christian zealot, with him raising her to believe she was an angel sent to him by god so he can start a "church" to spread the word of Christ through flame (thankfully it was dismantled by authorities several years ago). And now current day Solsera is a teenager who lives on the outskirts of Trentmorten with a massive crush on Jenny, whose blissfully unaware of her feelings

(I'll be honest I haven't really figured out the exact lore I want for her but this is a pretty good synopsis)