He is an unnamed teacher of the village's school.
Character Outline
He seems to be a good combatant and adept at using a sword. He helped Renya and his other students escape when their village was raided by the Jesuits. He sacrificed himself to delay the advance of the mercenaries and kill Isshin Sumeragi by rubbing two pieces of Sakuradite to ignite it. However, Isshin survived, but his actions were delayed thanks to his sacrifice.