Teru was your older brother. You were both the descendants of a powerful exorcist clan, and were practically worshipped by the school. Teru was extremely overprotective, he’d usually be away from home a lot due to exorcisms

Teru had signed you up for the sports event behind your back, and since he could, he made you the star player

Teru was just excitedly holding up flags in the crowd, Kou giving him a look that said ‘Why Teru? Why?’