Tristan, identified as Shuu Lei Fan in Japanese media, ranks among five warriors bestowed mystical samurai armors to oppose the demonic Arago. He wields the Armor of Halo (Korou Yoroi), embodying the virtue of Wisdom and harnessing the element of air or wind. His primary weapon is a large no-dachi sword.

As the Korou armor bearer, Shuu Lei Fan exhibits calmness and analytical thinking in combat, contrasting with more impulsive teammates. He demonstrates strategic planning and battlefield assessment proficiency, leveraging his armor's wind-based abilities for swift movement and defense. His fighting style merges precise swordplay with elemental control.

Shuu Lei Fan shares a close, longstanding friendship with Touma, predating their armor inheritance. This bond manifests through coordinated tactics and mutual trust against Arago's forces. Within the team, he frequently provides tactical support and maintains composure under pressure, bolstering group cohesion.

In the OVA *Gaiden*, Shuu Lei Fan joins the warriors investigating Sage's disappearance after Sage's armor appears controlled by an evil sorcerer. The group travels to New York and Los Angeles to confront this threat, during which Shuu Lei Fan's armor briefly falls under enemy control before liberation. The OVA *Legend of the Inferno Armor* features him among the warriors battling a mysterious enemy wielding a black copy of the Inferno Armor. In *Message*, he is targeted by a time-traveling antagonist seeking to destroy the armors, facing personal temptations related to unstated desires.

Official media provides no concrete details regarding Shuu Lei Fan's family history, pre-armor life, or recruitment origin. His development occurs primarily through combat experiences and interactions with fellow warriors.