Formally known as Kellad, he was the captain of the royal guard of Sharenian. He became the teacher of Sharen IV. When Sharen III tried to kill Sharen IV, he stopped him and saved Kellad's life. Later, Sharen III was vindictive and tried to execute him for treason, but Sharen IV was able to keep him alive. In the end, he becomes the commander of the Sharenian Defense Unit, which is the knighthood of the knights (Hardin, Ain, Ryan, Quieg, Ed) who failed. After Sharen III summoned Ergoth Dunamis in response to a coup lead by his son, Sharen IV, Kellad and his squad were trapped in an alternate dimension created by Ergoth. Forced to relive the events of Sharenian's fall for centuries, he and his squad went insane. Eventually, his squad turned on him and he had no choice but to order Quieg to kill them. After the Black Mage freed him and gave him the power to resurrect his squad, he pledged to serve him and remain forever loyal. Eventually, he becomes Guard Captain Darknell, combined with Ergoth via the Rubian, a jewel infused with the Black Mage's Transcendent power.
- 친위대장 듄켈 (Guard Captain Dunkel, Chinwidaejang Dyunkel) comes from Dunkel, which is the German word for "dark", and is also the name of several types of dark German lager.
- In KMS, "오늘 친위대장은 너희들에게 매우 실망했다." (Oneul chin-widaejang-eun neohuideul-ege maeu silmanghaetda.) ("I, the Royal Guard, am very disappointed in all of you today.") is based on a South Korean meme and famous line of the webtoon HIVE, "중대장은 너희에게 실망했다!" (Jungdaejang-eun neohuiege silmanghaetda!) ("You're all a disappointment to your company commander!" (Pay))
- Ergoth's leitmotif/theme BGM was Eregos, but in Awake update, his theme changed to SubterminalPoint, the same theme as Guard Captain Darknell.
- He shares a voice actor with Ed.