Inori lives in town with his older sister, Seri. He's well loved by the kids in town and he takes very good care of them. He harbors a passionate hatred for the Oni.
He fights with fists, feet, or fire, depending on the situation.
The reason Inori hates the Oni is because he belives Seri was deceived by Ikutidaaru, which resulted in the siblings being chased out of their village.
Game to Manga comparison: Coming soon!