A classmate that befriend Harutora and Touji during their first day at academy. He ended up unwitting involved in the Yakou Disciple incident when he was caught in attack from a shikigami called a Kodoku meant for Harutora. He however resolved himself to help Harutora rescue Natsume after listening his request. Since then Temna has been drawn in various events related to the cult despite his somewhat cowardly nature. He is quite knowledgeable on various relating to current events of the Onmyodo world at large and sometimes helps Harutora catch up with his studies by lending him his notebook.