Mariella

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
In search of a cure for Asta's arms, Noelle Silva and Finral Roulacase visit the house of Mariella, Fanzell, and Dominante. 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 Dominante 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.