Baron Kaido serves as the principal of Root Academy and a high-ranking officer in the Puzzle of God organization. He was assigned to partner with the genius solver Makata Jin, forming a mutually beneficial partnership where Kaido designed puzzles to develop Jin's abilities, while Jin's rapid solving contributed to Kaido's own growth as a puzzle giver.

Though not a Phi Brain candidate himself, Kaido dedicated his efforts to identifying and developing others with such potential. He recognized the puzzle-creating talent in Souji Jikukawa after Jikukawa was rejected by the Orpheus Armlet, offering him a role as a giver within P.O.G.'s Section Phi to create puzzles and seek out candidates at Root Academy.

Kaido acts as a guardian to Kaito Daimon, whose parents—also P.O.G. officers—died when he was young. Initially a duty, Kaido genuinely came to care for Kaito as his own son and sent him to a boarding school in England.

As principal and P.O.G. officer, Baron Kaido oversees the installation of Kenja Puzzles within Root Academy and facilitates travel and accommodations for Kaito and his group as they confront various puzzles and adversaries. His efforts remain focused on supporting solver development and maintaining the operations of P.O.G.