Kaibutsu

Breed: German Shepherd mix (Former), Mutation (Current)

Also known as experiment P4, he is a genetically altered dog created by humans; an enormous beast that weighs almost 600 pounds. During the painful lab experiments, Jerome was the only dog to comfort him. After escaping his laboratory, Jerome and his corps were sent to destroy him. Kaibutsu eventually took shelter in Gajou where he killed and devoured humans as he pleased.