Heathcliff is the personal butler of Fred and his father, and a minor character in the 2014 animated feature 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 that the butler rescued them in the family chopper after being stranded on an abandoned island.
Aside from Professor Callaghan and Alistair Krei, Heathcliff is apparently the only civilian aware of the team's true identities. Ironically, Heathcliff himself is already aware that Fred's super heroic lineage is coming from his father, thus making Fred his father's successor through his family bloodline.