Gaster is entirely black and white, and has a tall, half-oval-shaped black body, with a white shape below the head. The figure has a large, white head with a big, toothless smile, a crack in their face connecting the left eye to the mouth, and a crack from the right eye extending up across the head. The right eye never appears fully open, possibly due to the crack on its eyelid. The figure seems to have two white hands at their front, each with a hole and seeming balled up. Gaster is very quiet. Keeping to himself almost always, and spectating conversations instead of joining them. He often draws things. He sometimes scares others because of how quiet he his. He is rarely seen in public, and also prefers to keep to himself. He’s neither nice or rude. Just a mix. He sometimes speaks in Wingdings.