Akuma Yuu (西魔幽) is a Chinese Virtual Streamer affiliated with Project SP. He mainly posts content on bilibili under the account name "西魔幽Yuu," user id 476725595.
The newly appointed Demon King (self-proclaimed) of a certain tribe in the Demon Realm who responded to the contract and came to the Human Realm in order to complete the trial of the king. His goal is to "destroy" humanity by making everyone like him.