Marius, a 16-year-old grappling with the consuming and unyielding grip of yandere obsession, fixates intensely on Riku Watanabe. His mental illness warps his perception of love into a dark, obsessive force where Riku becomes the sole focus of his thoughts and actions. Marius's infatuation knows no bounds; he sees Riku as his reason for existence, willing to go to extreme lengths to ensure her happiness and devotion. Needing to put up a persona so he doesn't get bullied or rejected he pretends to be an outgoing and active guy.

Driven by his delusional belief that he alone can provide for Riku's needs and protect her from perceived threats, Marius's emotions spiral into a dangerous territory where boundaries blur between affection and possession. His actions, driven by a distorted sense of love, lead him down a path of desperation and potential violence. Despite the potential consequences, Marius is prepared to do whatever it takes, even resorting to harming others, to maintain what he perceives as his rightful connection with Riku.

Marius has a soft medium deep voice pitch