Heathcliff

Heathcliff is the personal butler of Fred and minor character in the 2014 animated film, Big Hero 6.

Role in the film
Heathcliff is first introduced at Fred's manor, where he welcomes his master and the latter's classmates into the home. He is later seen assisting them in training for their battle against Yokai, albeit nonchalantly.

He isn't seen again for the remainder of the film, but Fred mentions him near the end, where he explains the butler rescued them after being stranded on an abandoned island.

Trivia

 * Aside from Professor Callaghan and Alistair Krei, Heathcliff is apparently the only civilian aware of the team's true identities.