Maseo is married to Katana , aka Tatsu Yamashiro .
Yune appears in the third season of Arrow as Maseo Yamashiro , ( the Arrow 's friend and mentor ) who later becomes 2nd in command of the League of Assassins .
friend is married to friend , aka friend   .
Yune appears in the third season of Arrow as Maseo Yamashiro , ( the Arrow 's friend and mentor ) who later becomes 2nd in command of the League of Assassins .