[@Kensai] Is there anything further that you want to establish with my char? I reckon Koharu and Eikichi know each other pretty well, they probably orbit the same friend groups, plus if she lived in Minamikawa for any amount of time she definitely got to know him and his family. 

[@Vertigo] If Ryuu was visiting in the summers and hanging out with Mikako, he most definitely hung out with Suzu and Eikichi too, but idk if you want them to be more than childhood playmates. Eikichi doesn't like trouble if he's not the one causing it, but since it's likely that Suzu and Ryuu will become close, he'll definitely be keeping an eye on the resident delinquent to make sure nothing funny happens with his best friend...