Added the pun tag, because apparently is a joke on Byakuya's name (which is also the kanji for Tsuruno). When he was first revealed, there was a initial misreading of his name.
A present for Fate/zero Netabot-samaSorry!Nah.I'm ByakuyaThe next dayUh?Is that so?!Tsuruno-kun
The name Byakuya goes by the same kanji as Tsuruno.You don't even take the trouble to remember it, do you.Tokiomi-kun & Byakuya-kun.It's all right, they always read it wrong.Tsuruno-kun