(in my take, sans is really scard of blindness even though he can barely see anything, and he can't use blue bones so he uses blue gaster blasters instand, and really wants to reunite/see his brother since he really miss him.)

𝓒ℛ𝓔𝓓𝓘𝑇𝓢

underworld - CoulsArt

Lolestman's Underworld - me

sprite - me