In the vast world of Black Clover, where kingdoms constantly compete for dominance and magical supremacy, many characters break the mold of traditional archetypes. Their unique personalities and their presence in the series overall end up enriching the narrative. Their presence adds emotional depth, allowing the story to transcend the typical shonen formula.
In Black Clover, one such character that stands out is Fanzell Kruger, a man whose journey from military commander to rogue mentor offers a rare and humanizing glimpse into the moral complexities of the Black Clover universe. Fanzell Kruger once held a prestigious and dangerous position as a Commander in the Diamond Kingdom's army.
As an official mentor in the Diamond Kingdom, he was given the responsibility of ensuring that everyone managed to reach their peak, especially in the magical prowess and combat techniques of future elites, including Mars, Ladros, Fana, and Mariella.
Although he was brought up in a kingdom that focused on a formulated way, Fanzell Kruger did not approve of the normal methods of the Diamond Kingdom. Particularly, he loathed how his native place willingly manipulated and sacrificed children for military gain.

Driven by his moral convictions, Fanzell abandoned his post and fled the kingdom with his wife, Dominante Code, a move that would have serious consequences in the world of Black Clover, and make him a hunted man.
Fanzell’s most prominent arc takes place during the Witches' Forest storyline. After learning of Asta’s cursed arms and the inability of traditional healing magic to help, Fanzell chooses to help his student again, despite the risks involved. Along with Noelle, Finral, and Dominante, Fanzell travels to the Witches' Forest to plead with the Witch Queen for aid.
In this journey of his, Fanzell tries to reason with his former students, Mars and Ladros, and he also reveals his past connection to them. Unfortunately, they were not the people he knew anymore, as they had become hardened soldiers, symbols of the very system he once rejected. This emotional clash underscores the tragedy of the Diamond Kingdom’s policies and Fanzell’s guilt.
Moreover, this attempt at confrontation was unsuccessful, and he put himself at great risk to protect Dominante, even getting injured in the process. Yet his pleas for Ladros to choose a better path fall on deaf ears. Just when all hope seems lost, Mars intervenes to protect Fanzell and Dominante, much to Fanzell’s shock.
Fanzell Kruger’s personality and abilities in Black Clover

Though Fanzell in Black Clover is often used for comedic relief, most notably for his habit of answering the door without wearing clothes, to Dominante’s eternal frustration, his character has layers that make him deeply endearing. He’s light-hearted, yet deeply principled. Carefree, yet burdened with guilt. His laid-back nature and oddball habits serve as a foil to the intense seriousness of the world around him.
While he may not be part of the Clover Kingdom elite group of mages, he’s a formidable magic swordsman with a wide arsenal of wind-based spells. He is proficient in Wind Magic. In the middle of a battle, Fanzell manipulates wind for attack, defense, and mobility. He often combines his magic with his swordsmanship, enhancing his physical attacks.
Finally, Fanzell’s grimoire in Black Clover is a diamond-attribute book, enabling these spells and reflecting his origin in the Diamond Kingdom. His combat experience as a commander and teacher makes him a tactical and skilled fighter, able to anticipate enemy strategies and respond with precise counters.
In conclusion, Fanzell might not appear in every arc of Black Clover, but his presence is felt throughout the story. His impact on Asta, Mars, Fana, and even the structure of the Diamond Kingdom’s internal resistance is profound. He represents the possibility of defying cruelty and building something kinder in its place.