Mariella

Mariella (マリエラ) is a former assassin of the Diamond Kingdom that was tasked with bringing the deserters Fanzell Kruger and Dominante Code back to the kingdom, but after encountering Asta, she chooses a different path of life.

Appearance
She is a slim, fair-skinned young woman with pink eyes and short black hair.

Personality
Mariella is shown to be highly dangerous in combat since she is a former assassin, but is shown to be kind.

Biography
Mariella was born in the Diamond Kingdom and is trained by Fanzell Kruger. After becoming an assassin, she is ordered to recover her former teacher and his wife, Dominante Code, for deserting the kingdom. However, she is stopped by Asta and other Black Bulls and convinced to leave with Fanzell and Domina, settling outside of the Diamond Kingdom.

In search of a cure for Asta's arms, Noelle Silva and Finral Roulacase visit the house of Mariella, Fanzell, and Domina. When Fanzell answers the door naked, Noelle blasts him with water, and Mariella asks that she be careful not to break their rundown house. However, when Domina starts hitting Fanzell for his inappropriate behavior, Mariella wonders if he will break before the house does. After hearing what has happened to Asta, Mariella wants to help in order to repay the Black Bulls.

The group returns to the Black Bull's headquarters, picks up a confused Asta, and rushes off to the Witches' Forest.

Magic

 * Ice Magic: Mariella uses this form of magic to generate and manipulate ice.

Abilities

 * Master Assassin: As a Diamond Kingdom-trained assassin, Mariella is skilled enough to sneak up on experienced opponents and take them by surprise.

Equipment

 * Grimoire: Mariella possesses a grimoire that contains various ice-based magic spells.

Fights

 * Fanzell Kruger, Dominante Code, Mariella, and Witches vs. Diamond Kingdom Army: Win

Events

 * Helping Asta: Searching for a Cure
 * Invasion of the Witches' Forest

Trivia

 * Mariella's favorite things are poking holes, time spent with Fanzell and Domina, and cake pops.
 * Mariella ranked 24th in the first popularity poll.