King XGaster

XGaster is more of a mysterious character, showing his isolation to the main characters except in special times, such as when XTale!Sans attempts to murder XTale!Frisk on stage. He's also a very clever man; knowing that everyone would soon revolt against him, he took his own soul and handed it to Ink for safekeeping. Despite this, he shows much more borderline sociopathic and abusive tendencies towards his children, seeing them more as "experiments" than anything else. He barely cares about anyone's else feelings, and only wants them to fall into his own hands, using them as a puppet to his advantage.He is also shown to be extremely obsessed with control and shows several traits of narcissism such as ranting about his kids for fighting back and accusing them of being "ungrateful." He also calls the other universes that aren't his own "garbage." This all shows that beneath his stoic and calculating demeanor, he is mentally a child who sees his universe as a toy box.