Yama

Yama is a big villain on Big Hero 6: the series.

In Baymax Returns, Yama steels Baymax's bare endo skeleton and makes more of them to steal a pointy item from Professor Grandville's desk.

In Small Hiro One, Yama blackmails a former SFIT student.

In The Bot Fighter, Hiro suspects Yama of using bot-fighters' creations to steal.