Mistrene Callous, known as Mistre, plays as a forward for the Ogre team, wearing jersey number 11. He presents a notably slender and feminine appearance, featuring pale skin, long teal hair styled in side pigtails and a back braid, and grayish-purple eyes with prominent lower eyelashes. This delicate look sharply contrasts with his savage, violent, and physically intense playing style on the field, a defining trait.

His background stems from a childhood filled with excessive praise for his looks, fostering pronounced vanity and narcissism. Mistre learned to view his beauty as a weapon, reinforced by academic success and popularity among female students who formed a protective circle. His parents, government officials without advanced education, heavily invested in his upbringing to secure his future, inadvertently feeding his sense of superiority. At Ogre Academy, Mistre ranked second academically and physically, directly behind team captain Baddap Sleed. This position instilled a deep-seated inferiority complex towards Baddap, culminating in Mistre challenging him to a martial-arts duel. Mistre suffered a decisive defeat that humbled him and solidified his unwavering loyalty to Baddap. He then embraced Baddap's goal of dismantling soccer to reform Japan's future.

In the movie *Inazuma Eleven: Saikyō Gundan Ogre Shūrai*, Mistre participates in Ogre's match against Raimon. Initially dismissive, he only engages seriously upon Baddap's command. He contributes to the offensive combination hissatsu *Death Break* with teammates Eskaba and Baddap, though Endou Mamoru's *Omega the Hand* thwarts their goal attempt. Mistre's violent tendencies manifest through deliberate attempts to injure Raimon players to achieve Ogre's objective. During the post-match exchange where Baddap nearly shakes hands with Endou, Mistre shows visible shock and protest alongside his teammates. The film concludes with Mistre appearing emotionally affected by Endou's words about hope and the future, suggesting a potential shift in perspective.

Across game adaptations, Mistre remains an Ogre forward. His signature hissatsu techniques include *Death Spear*, *Death Rain*, *Judge Through 2*, and the collaborative *Death Break*. Gameplay mechanics reflect his high speed and kicking power, emphasizing offensive capabilities. Recruiting him requires defeating Ogre or related teams and fulfilling specific item, player, or topic requirements.

Personality-wise, Mistre is cold, rude, and confident, masking his demeanor with outward calm. After his duel with Baddap, he demonstrates unwavering obedience, adhering to commands without hesitation. His violent inclinations align with Ogre's mission, though the movie hints at a capacity for change after the Raimon confrontation.