Frisk is NB

Napstablook is NB

Sans and papyrus don’t have no-no bits but still use he/him witch means they have preferred pronouns witch mean Lgbt

Washua is probably bisexual maybe

Undyne is lesbian

Mad dummy is NB

Alphys is lesbian

Royal guards are gay

Mettaton is some kind of trans

Mad dummy (switch ver) is trans

Chara is NB