Karl Yune portrays Maseo Yamashiro (mentor and friend to Oliver Queen) on the hit show Arrow. Karl＇s character Maseo is a DC Comics character who has had a strong presence throughout season 3 in the flashback story line, as well as in the present day story as Maseo＇s alter ego Sarab (2nd in command of the League of Assassins and ally to DC character Ras Al Ghul). Karl was born and raised in Washington D.C. and was accepted to Columbia University as a business major. His study and love of Shakespeare during a literature course influenced him to switch his major