So, what do I do when confronted with a semi-blank slate character?
Make up an incredibly ridiculous backstory, of course. Undertale is a good example in point, because of how deliberately vague everything in it is-given my fertile imagination. Obligatory spoiler warning despite the game having been out for quite some time now.
The main character of the game is intended to be a blank slate. Their low-res appearance is intended to be of an ambiguous gender.
Nearly of my Frisks are girls, based solely on me thinking the sprite looked more like one. But more importantly, all of them have extant human families. The story of the one who climbed the mountain varies a lot-ranges from the child of two wealthy financiers to a struggling parent, to a crackpot “analyst”. But the one variable is that all of them are kind and loving. The worst I got was an unscrupulous and hideously ambitious “stage mom” who pushed her daughter too hard and, post-pacifist end, sees her as a way up-but who is still ultimately caring and not outright abusive.
I tend to dislike kicked-puppy backstories, and for someone like Frisk, it makes even less sense that an abused, beaten child could be as friendly and forgiving as them (to say nothing of their incredible will to live).
One of my crazier, not serious ones is Frisk as a Little Sister style test subject, the antithesis of that. One of my crazier ones is her as a descendant of a Circle Trigon fighter, but that’s just me liking that crazy taxpayer-funded Esperanto empire too much.
Chara, the other human in the game, is a harder case. A kicked-puppy background is easier to justify for them, as they “hated humanity” and ended up committing suicide. At first, I made Chara a boy named Charlie, but now they’re sometimes a girl with that as their proper name.
To be honest, Chara never held that high a place in the story for me. They’re long dead by the time Frisk drops into the underground, and that’s that. No genocide route and none of the increasingly twisted “narrator Chara possession” theories.
But I still wanted a backstory, and my most recent attempt at one was surprisingly large. Chara’s father was a war criminal who met a violent end, leaving his/her De’Londa Bryce-esque mother to try and preserve her lavish lifestyle on his dwindling ‘prize money’. When Chara got old enough, reading about their father’s actions and mother’s stress made something in them snap and they ran off to the mountain where it was rumored no one returned from. The rest was history.
Although, the words “war criminal” and “cutesy Earthbound homage” don’t exactly go well together. Oh well…