|Voice actor:||Toshihiko Seki|
|Character type:||Master, Human|
|Derwin's Theme ~ Holy Flame|
The Master of servant Hunter during the events of Fate/Regalia. A nice boy who disapproves of his Servants rather arrogant attitude. A member of the Chivalric Orders and takes the "Chivalric" part rather seriously. Surprisingly, despite his part in the Chivalric Orders, he seems to be a rather mild personality, not what one expects of a "monster-slaying miracle". He is generally accepting of all people except the monstrous Dead Apostles, and does not see extermination of Half-Bloods or Magi as the Churches responsibility unless they were to truly descend into the depths of madness and sin.
An odd monster hunter, who strikes those who meet him as a mild mannered individual. Derwin is something of a true nice guy in spite of his job. He is kind and courteous to others, and while not a deliquent, can occasionally be silly. Derwin has demonstrated any trouble making friends, and is very open to those he speaks with. He has seemingly no ability to actually kill those that are not "real monsters", which was what led to the single failure on his record. He is merciful, refusing to kill a defeated enemy if they are not an irredeemable monster, and has even been known to heal the wounds of dying enemies in order to save their lives. Derwin seems almost too innocent for the Moonlit World and OLYMPUS that he is a part of. It is only when he is "on the clock" as it were, that he begins to show a state of mind that would suggest that he has managed to kill multiple Dead Apostles on his own, and save the lives of more experienced Executors. Derwin is all but silent when fighting, and never bothers to speak a word to a monster that he is about to kill.
Little known. Skill in the usage of Reinforcement and Healing Magic is known, but to what extent is uncertain. Is a known user of Black Keys.
Has been on several hunts for Dead Apostles, with only one of them ending in a highly unusual failure. He is considered a prodigy of the Chivalric Orders, and his natural gifts in magecraft a miracle of God. Despite a relatively young age of 18, he is considered to be highly accomplished in his field. No other information currently.