The character Baymax, created by Steve T Seagle and the American Duncan Rouleau, first appeared in the film Big Hero 6.
[['Baymax', 'FIRST_APPEARANCE_IN_FILM', 'Big Hero 6 (film)'], ['Duncan Rouleau', 'NATIONALITY', 'Americans'], ['Baymax', 'CREATOR', 'Duncan Rouleau'], ['Baymax', 'CREATOR', 'Steven T. Seagle']]