Carl Islands

Grand Professor is one of the Numbers (12 Apostles) of Rebellion, and one of the most important members of the organization.

Appearance
Grand Professor's appearance is unknown.

Personality
Grand Professor's personality traits are unknown, but most likely shares Rebellion's ideals. Though Ikki implies that he may a liar and unfair as the paintings that Sara sold were worth much more than the cost of her operation meaning that she could've paid off her debt and wouldn't have needed to join Akatsuki.

History
At some point, Grand Professor was asked by Kouzou Kazamatsuri to treat his adopted daughter Sara Bloodlily's brittle bone disease. Sara wasn't completely healed but she obtained a body that could at least move.

Night of Massacre
When Rebellion's headquarters were destroyed by Or-Gaule, and his followers, Grand Professor was not present. Grand Professor is also mentioned being one of the only three people in Rebellion who know Tyrant's location.

Abilities
Master Doctor: Grand Professor is an extremely skilled doctor even curing Sara of her illness.