Obake, also known as Bob Aken, is a villain figure who first appeared in Big Hero 6: The Series. Obake is a slim man with blue eyes, an English accent, and a pale complexion.
Bob Aken had ambitious intentions to use cutting-edge technology to improve the world while still a student at SFIT. But after his accident, the lasting brain injury he sustained had a terrible impact on his mind, making him icily cold-hearted and insane. While he still wanted to improve the world, he considered any harm or even death to innocent people to be a tiny price to pay for his goals. He developed into a menacing figure who frightened other criminals. He appeared calculating and patient despite his irrational ideas. He preferred to remain hidden from the majority of the public, carrying out his attacks while using goons or hired criminals.