Tomura

Erin's 'sempai'. He is respected by his peers and underclassmen. Tomura was originally the person in charge of Lilan. But Erin, a middle schooler, was put in charge of taking care of Lilan and Tomura, a high schooler, was dismissed. After seeing Erin's determination, he becomes intrigued by her and develops a crush on her. This showing when he said he would to protect her from those who see Erin's bond with Lilan as a potential weapon for war.