A murderer, soul has 4 stages, stage 1, can be trusted, stage 2, can't be trusted, stage 3, murderous, stage 4 they black out and go on a killing spree, has a crush on toriel, sees those he killed as hallucinations, flirty, romantic, likes ketchup, gaster blasters shaped like dragon skulls, bones are sharp, aggresive, has a slight crush on other sanses. Frisk's ghost talks in ```hello world``` for example. A skeleton that likes puns.