Board Thread:General Discussion/@comment-24510002-20171201220952/@comment-4525039-20180116105127

Angelo Gabrini wrote: Yes, he did. Also, the manga seems to have a new non canon member (the guy worrying about Asuto after he falls), and gives the names of all of the Seishou members. The GK's name matches the name I added when I created his page so I assume their names are canon

Edit: Some of these Seishou members have weird surnames I guess the manga has a habit of creating a Tamano Gorou-like character. This is their own canon after all.

Besides Futagotamagawa Tetsuya and Shiratori Tsumuki, I think they have normal names unless Seishou has a theme behind them like they are a group of defects or something.