"Alphys is a yellow, reptilian monster of similar height to the protagonist. Her posture is somewhat hunched over. She has yellow scales, claws, and protruding teeth (which seem to vary between two and four depending which way she faces). Her feet have three toes while there's three fingers and a thumb on each of her hands. Her "hair" is designed into points facing the back of her head. She normally wears round glasses a white lab coat. Her glasses don't cover her eyelashes. 

Alphys is a nerdy, shy recluse with a fondness for  anime and manga. She dates Undyne, but struggles to communicate her feelings.

Has a throaty, tremulous feminine voice.

Assigned voice: Velma from Scooby Doo or Peridot from Steven Universe