TV-Series
Description
Haruhiko Usumizawa is a teacher at Y-Academy, where he serves as the instructor for Japanese in Class 1-A and oversees students including Jinpei Jiba, Mataro Tamada, and Sandayu Koma, in addition to managing student housing. His physical appearance includes white skin, glasses, and a black toupee, and he is typically dressed in a brown coat worn over a beige sweater and a white collared shirt, complemented by a green tie with lime green stripes, grey khaki pants, and black shoes.

His background is deeply tied to the supernatural, as he is revealed to be the reincarnation of the yo-kai Whisper, having survived the destruction of the Yo-kai World. In his role at the academy, he initially appears to act under coercion from alien forces who granted him the power to transform the deceased into hostile entities known as Onryo. This ability is activated by infusing a strand of his hair with magical breath and throwing it at a victim, a power that ultimately stems from energy transferred to his hair by a character named Nayu Kuruhoshi. Using this method, he transforms individuals such as Suruzo Oita and Kyodai Salaryman Miyazawa-san into Onryo like O Eater and Cyclops.

Despite this antagonistic behavior, his true motivation is not malicious. He secretly uses his power to create challenges that help the YSP Club grow stronger, revealing a strategic intent to forge them into more capable fighters against extraterrestrial threats. Key relationships include his connection with Nayu Kuruhoshi, for whom he ultimately redeems himself by freeing her from a robotic replacement that had been implanted in her place, and his dynamic with Jinpei Jiba, to whom he gives his own Y Medal, allowing Jinpei to transform into a being called OK Haruhiko. His development arcs from an antagonist performing the bidding of aliens to an ally who joins the YSP Club in confronting these same adversaries. Notable abilities include the aforementioned Onryo creation, the capacity to be summoned as a fighting entity whose medal transforms the user into a translucent blue form with a ghostly tail replacing the legs, and the use of a laptop that resembles Whisper's Yo-kai Pad.