Big Hero 6 — Characters & Cast

Initially motivated by self-interest, then by revenge for Tadashi's death, and finally by the desire to protect his friends and the innocent.

Starts as an aimless genius wasting potential, moves into a vengeful vigilante after tragedy, and evolves into a selfless hero who understands that helping others is the true way to honor his brother.

To heal the sick and injured; specifically, to improve Hiro's emotional and physical well-being.

While a robot without feelings, his 'arc' is the expansion of his programming's application. He goes from strictly following medical protocols to understanding the complexities of human emotional needs, ultimately making a self-sacrificial choice.

Revenge against Alistair Krei for the apparent death of his daughter, Abigail.

A respected professor who descends into madness after the loss of his daughter. He serves as a dark mirror to Hiro, showing what happens when grief is processed through vengeance without a support system.