Board Thread:General Discussion/@comment-5719892-20171024211142/@comment-11860859-20171120084916

^ I think in terms of Haizaki talking to Asuto and Yuuma as upperclassman will follow around the same path as Tsurugi, as he begins with no honorifics at all, if any later on, he'll probbaly just add a "san" instead of "senpai." Besides, they don't use san/senpai all the time-Tsunami was the oldest back in original Inazuma and the only ones who some to him with honorifics were the 1st years.