Stanislav Nikolayevich Sokurov is the Russian national serving as resident medical doctor and school counselor at St. Alphonso Academy, an elite boarding school isolated on a Pacific island. His duties focus exclusively on student health and psychological well-being within the academy.

He presents as an adult with gray hair typically reaching neck or chest length and striking purple eyes. His consistent visual signature includes glasses and a lab coat, often accessorized with scalpels, creating a clinical presence. This appearance contributes to perceptions of intimidation or sadism from students like Henri, stemming from their unresolved past conflicts.

Beyond his medical role, a military background surfaces during critical events. He displays significant combat proficiency during an ambush on the academy, where he partners tactically with Ivy, a former soldier turned taxi driver. Together, they neutralize multiple threats on a beach, demonstrating physical capability and coordination. His demeanor shifts from clinical detachment to focused action in such situations.

His relationships maintain professional distance, though he sustains a consistent operational partnership with Ivy, frequently appearing alongside him during major incidents. Across the anime's episodes, his role remains supportive and static, facilitating plot points tied to student welfare or academy security without personal development or expanded backstory.