the fact that the other fallen humans never made it out of the underground is kind of what humanizes them. like yeah ok they were a bunch of kids in a cavern filled with monsters who need their soul, they never stood a chance. frisk is different. they will get out no matter what.
took a bunch of screenshots of the among us story demo so i could have references for artwork, here are some where i think the character designs are relatively clear (1/3)