chara (undertale), frisk (undertale), adidas, undertale, utdr (toby fox), xtale, absurdres, highres, 2boys, alternate costume, alternate universe, antenna hair, arm at side, bright pupils, brothers, closed mouth, colored sclera, dobaosh, double vertical stripe, facial hair, frown, greyscale, hair between eyes, hair over one eye, hair tie, hand up, hands in pockets, head on another's shoulder, high contrast, jacket, long sleeves, looking at another, looking at viewer, looking down, low ponytail, male focus, medium hair, monochrome, multiple boys, one eye covered, pants, ponytail, puffy long sleeves, puffy sleeves, purple eyes, scar, scar across eye, scar on face, short hair, siblings, simple background, spot color, track jacket, upper body, white background