He is voiced by Nobuhiko Okamoto in the Japanese Version and Austin Tindle in the English Version.
He have black hair and yellow eyes.
It is hinted that he has feelings for Shirayuki, but his loyalty to both Zen and Shirayuki prevents him from acting out on his feelings.
Originally sent by Marquis Haruka as a way to scare Shirayuki out of the castle, he later pledges himself to Zen after being discovered. Obi has a relatively mysterious past as a loner, but finds himself drawn to protecting Zen, Shirayuki, and their respective goals. He later becomes Zen's official messenger. With his quick movements and reflexes, he is often sent by Zen to protect Shirayuki at times when he cannot leave his royal duties.
- His Japanese Voice Actor, Nobuhiko Okamoto also voices Rin Okumura from Blue Exorcist, Accelerator from A Certain Magical Index, and Katsuki Bakugo from My Hero Academia.
- His English Voice Actor, Austin Tindle also voiced Ruth from The Ancient Magus' Bride, Kiyotaka Ishimaru from Danganronpa: The Animation, Ken Kaneki from Tokyo Ghoul, Accelerator from A Certain Magical Index & Lunarre from Tales of Zestiria the X.