Grandma is the leader of the citadel, and her role is to keep the place running with her charisma and strong decision making skill.
She had charismatic and rather kind personality.
She seems to had special interest on the trio, who she respected due of their abilities.

Grandma is a old woman who always wear smug expression, she has a purple hair, wore golden sunglasses, and wears a large coat.
She also wears earrings that resemble a cat holding onto her ear.