fou (fate)
A small, white, rabbit-like animal with a long fluffy tail that is the unofficial mascot of the Chaldea Security Organization. Likes following Mash Kyrielight around, even in singularities.
Revealed to be the Grand Order universe's incarnation of Beast IV, aka Primate Murder in the climax of the penultimate Grand Order. Gives up his power to bring Mash back from the dead and give her a normal human lifespan.
True name: Cath Palug
Design: Taiki (luster)
Voice: Kawasumi Ayako (Drama CDs, First Order OVA, Babylonia anime)