
Blue: Spawns a buzzsaw that flys out towards its intended area. Cyan: Fires a string used for restraint, as well as flinging the captured victim around. Green: Summons a green shield which consumes magic to strengthen and maintain.
Yellow: Rapidly fires yellow projectiles. Orange: Spawns explosive orange bombs in a desired area, that explode on command. Chroma Hands: Gaster has seven hands that are each able to mimic one of the seven Human traits at a time. This buildup of rage and mistakes eventually leads to his breaking point in Animosity. His repressed memories’ resurfacing adds to the deterioration of his mental state, as his insistence to avenge his son has resulted in constant failures. After being rescued from The Void, many of his memories are repressed. When in The Void, Gaster's sanity plummets to the point where he will kill anyone, including his own son, in order to return. He is a brilliant man, capable of calculating strategies to win battles. He is a kind person who gives people respect, and cares for his friends and family's well-being. Gaster's personality is initially that of a cool, charismatic skeleton. If both were to die, his eye color will return to its original purple.
If one were to die, that corresponding color will fade away.
When Sans and Papyrus are alive, he'll have both a red and light blue eye. When triggering magic, his eye color depends on the status of his two children. He sometimes wears a white lab coat when performing experiments inside his lab. Gaster typically wears a large black coat over a lighter shirt, with brown pants and shoes. His two eye sockets have permanent scars coming from them. Gaster is a male Boss Monster that has a skeleton-like appearance.