Isaac Schjerven

 (イサク・シェルヴェン, Isaku Sheruvuen) the guild master of the adventurers guild in Hirschfeld Town (ヒルシュフェルト街, Hirushuferuto-gai). Born from a noble family, he is a graduate of a certain school but has no adventurer experience, a painstaking man who changes from one job to another. He was bald and turned to Mukoda for help to which out of pity, gave him a hair recovering goods.