Fou (Fate) Rule 34

Fou is a small, white, rabbit-like creature who serves as the unofficial mascot of Chaldea in Fate/Grand Order. With a fluffy tail and an affectionate nature, Fou often accompanies Mash Kyrielight, even into dangerous singularities. Beneath this cute exterior lies a profound secret: Fou is the Grand Order incarnation of Beast IV, also known as Primate Murder. In a pivotal moment, Fou sacrifices his power to restore Mash to life and grant her a normal human lifespan. Fan artists are drawn to the contrast between Fou's adorable appearance and his tragic, powerful true nature. They frequently depict him alongside Mash, highlighting their bond, or explore his Beast form. His design, credited to Taiki, and his voice, provided by Kawasumi Ayako in various adaptations, have made him a beloved figure in the Fate franchise.