#I wonder if he calls Izuma by his surname because he can not pronounce Kohei pffft

[sun-sandwich]

OLD TACHIKAWA UNIT INFO

So according to volume 23 question 19... Tachikawa was the one who invented the name "Torimaru" for Kyousuke (to be more accurate he probably couldn't pronounce his name properly and ended up calling him Torimaru, then there is the smart Queen Konami who decided to use it in public because she thought it was his real name "I hope I didn't misread" lol)

A cute info that finally made me see Tachikawa and Kyousuke as (a Captain and former member of A01 unit)

Right now he calls him by the name "Kyousuke" not "Karasuma" like what he did in the CD drama