Shea Haulia, a rabbitman from the Haulia tribe, is the daughter of Chief Cam Haulia. Her distinctive pale-blue hair and azure eyes mark her within her species. She possesses rabbit ears and a tail, typically dressed in practical adventure attire: a sleeveless blue bikini armor top, miniskirt, and sturdy boots. Early on, she wore a slave collar as a disguise in human towns; Hajime Nagumo later transformed it into a decorative choker after acknowledging her.

Exiled from her homeland, Verbergen, due to her unique future-sight ability—particularly visions ensuring her survival—she became a target of persecution alongside her tribe. These visions led her to seek Hajime, foreseeing him as her tribe's savior. Initially noisy, overly optimistic, and prone to tears—earning her the nickname "worthless rabbit" from Hajime and Yue—she persistently pursued Hajime romantically with aggressive advances and voyeuristic tendencies, such as secretly observing intimate moments between Hajime and Yue.

Over time, Shea evolved into a more mature and confident individual, retaining her cheerfulness while developing a fierce, battle-oriented demeanor. She exhibits sadistic tendencies in combat, enjoys overpowering opponents, and enters uncontrollable rages when provoked, requiring Hajime and others to restrain her. Her exceptional determination allowed her to overcome psychological trials in labyrinths like the Frost Cavern of Schnee, where she defeated a doppelgänger exploiting her traumatic past. After formalizing her relationship with Hajime, she became more reserved about public affection but increasingly assertive in mediating conflicts among his companions, like intervening between Yue and Kaori.

Her abilities center on future-sight, heightened senses from her rabbit ears, and physical prowess. Initially reliant on "Body Strengthening" magic to augment strength, speed, and durability, she developed innate power rivaling Hajime's base strength. Her combat skills include mastery of the war hammer Drucken—crafted by Hajime—and proficiency in hand-to-hand combat, often using wrestling techniques. She excels in stealth, marksmanship, and instinctual adaptability. Later advancements allow her to merge mana with energy from the Star Spirit World, significantly amplifying her physical capabilities at great personal cost.

Key relationships include her initial friction-turned-loyalty with Hajime, whom she eventually marries. Her dynamic with Yue shifted from jealousy over Hajime's attention to a sisterly bond, involving combat collaboration and emotional support. She maintains competitive but respectful ties with others in Hajime's group, like Kaori and Tio. Deeply connected to her tribe, she participated in their transformation into a formidable force under Hajime's training and later engaged in community activities on Earth as one of Hajime's wives.