OOP I SPONTANEOUSLY DESIGNED AND THOUGHT ABOUT SHIZUKA AND YOSHIE'S 'MANAGER'
His name's Hiromi Sakamoto, and he's really just trying his best.
He inherited the position of 'manager' of the former idol group the twins' upperclassman friend was a part of... during his first year of high school, much to his surprise. He worked as an assistant to the previous one before they abruptly retired from the role, leaving the group without someone to keep an eye on the more technical things of their group. While a bit shaky at first, he did his best to maneuver the group during the remainder of the year and used it as experience for the follow up one. However, he was now without a group since the four original members had then graduated, and the remaining two in the same year as him didn't want to be bothered with having to recruit new members all over again. And so, Hiromi spent the majority of that small vacation time after first year trying to figure out what he was going to do... scouring his records for any familiar names.
And that was where the Kobayashi Sisters came in.
Hiromi is a young man who is well meaning and has an interest in managerial positions within the music industry. However, given the fact that he's usually a flurry of various tasks and making certain things go well for Shizuka and Yoshie's performances or events regarding them... he's easy to take advantage of because he won't be paying attention, and will just tack it onto the list of things he's already has going on. I meant it when I said the twins pitied him a whole lot upon getting reintroduced to him... Hiromi makes it easy to feel bad for him. But like, in a pathetic way lol