Masahiko Irie - Masahiko Irie appears to be the only contact in Sumaru that Izo had upon his arrival, after being quite suddenly torn from his life in Tokyo -- and even then it was a month before the two met in person. The teen is his junior in years, but also apparently his peer, and -- more privately -- also his superior; Iriesama has decided that Irie-san is responsible for educating Izo about the sudden, strange turn that his life has taken. Whether that burden will bear fruit or merely prove a nuisance to one or both of them is still probably very much up in the air.
