He is voiced by Hiroyuki Yoshino in the Japanese Version and Josh Grelle in the English Version.
Ox has a shaved head with two spikes of hair on the sides of his head, which he takes great pride in.
He is a bookworm who takes his studies very seriously, but considers himself to be a great warrior in battle, calling himself the "Great General Lightning King".
He has a mostly one-sided love for Kim Diehl, and is instrumental in persuading her to return to DWMA after she defects and is brainwashed into serving Arachnophobia, going as far as ripping out his hair to prove his loyalty to her, and growing out a full head of hair at her request.
- His Japanese Voice Actor, Hiroyuki Yoshino is best known voicing as Yoshimori Sumimura from Kekkaishi and Firo Prochainezo from Baccano!.
- His English Voice Actor, Josh Grelle is best known voicing as Akihisa Yoshii from Baka and Test series, Armin Arlert from Attack on Titan series, Byakuya Togami from Danganronpa anime series, Sadao Maō from The Devil is a Part Timer! and Joseph from The Ancient Magus' Bride.