Mariam is a character from the anime Beyblade: V-Force. She is a member of the Saint Shields, a group that seeks to capture the Bit-Beasts of the Blade Breakers, and is the older sister of Joseph. Her Bit-Beast and Beyblade are called Sharkrash. She has long blue hair that she ties into a high ponytail and sharp green eyes, often wearing a headband and arm bands.

Mariam possesses a wild spirit and a sharp sense of humor, frequently using sarcasm to provoke Dunga, another member of the Saint Shields. She is unpredictable in battle, employing unique moves that confuse her opponents and leave them vulnerable to attack. At the same time, she is one of the most serious members of her group, taking her role in the Saint Shields very seriously and often scolding Joseph and Dunga for slacking off or failing in their missions. She also has a noticeable fondness for food.

Initially, Mariam is entirely absorbed in the Saint Shields' mission to seal the sacred Bit-Beasts, which causes her to lose touch with the true spirit of beyblading. She is introduced as a mysterious blader who contacts Max and challenges him, using an invisible Bit-Beast and a cloak, which initially leads others to mistake her for the enigmatic Mr. X. She later battles Max in Las Vegas but is defeated. This defeat prompts a significant shift in her perspective, and after the battle she begins to understand the importance of passion and sportsmanship in beyblading, moving beyond a narrow focus on her assigned destiny.

Mariam often teams up with her brother Joseph, and the two form a formidable pair when facing difficult opponents. She also has a strained relationship with Dunga, whom she frequently jabs with sarcastic remarks. Her development throughout the series centers on her personal growth from a single-minded, mission-driven blader into someone who truly appreciates the spirit of the sport. Her key ability lies in her unpredictable, confusion-based fighting style, which allows her to unsettle and outmaneuver her rivals.