Jack Howl

Jack Howl is a first-year student in Savanaclaw. He is a tough delinquent who strictly adheres to hierarchy of power, and strives to increase his own strengths. He dislikes associating with others. He has a younger brother and sister that are also sporty like him. He also mentioned that they're able to play tag for 6 hours straight without getting tired.

Jack's unique magic is called "Unleashed Beast." It allows him to transform into a huge white wolf.

(Source: Twisted Wonderland Wiki)