Constance is a male Giftia, a type of android possessing human emotions, who serves as a supporting character in the Terminal Service Department of the SAI Corporation. He has the appearance of a young man in his late teens or early twenties, characterized by short blue hair, blue eyes, and a pair of glasses, often seen in his work uniform. Constance is the current partner of Kazuki Kuwanomi, having assumed this role after Kazuki's previous partnership with the Giftia Isla was disbanded. In this capacity, he acts as the Marksman for their retrieval team.

Constance has a gentle and kind-hearted personality, presenting a calm and cool-headed demeanor even in challenging situations. He is known for his sharp intuition and high perceptiveness, which allows him to understand the feelings and dynamics of those around him. A notably skilled individual, he handles his professional duties with grace and diplomacy, making him a reliable presence within the division. Beyond his work, Constance is also a magician, a talent that adds a lighter dimension to his character and makes him a beloved member of the department.

Within the narrative, Constance serves as a steady support for his often short-tempered partner, Kazuki, quietly but steadfastly assisting her in their missions. He also shares a positive relationship with the main protagonist, Tsukasa Mizugaki. While they get along very well and are of similar height, they are not depicted as having extensive conversations. At one point, when Tsukasa and Isla need guidance, Constance provides important insight and advice to help them reconcile their partnership.

Constance demonstrates significant development in his role by stepping in as a temporary partner to Tsukasa. During this time, he uses his perceptive nature to explain the unique operational philosophy of the First Terminal Service Department, revealing that its compassionate approach was largely established by Isla. This moment highlights his role as a wise and observant figure who understands the weight of a Giftia's limited lifespan. As a Giftia, Constance is aware of his own operational expiration date, and he seems to regard his own remaining time with a sense of care. His primary motivation is to effectively perform his duties and support his colleagues, showing a professional understanding of the emotional difficulties that come with retrieving expired Giftias. His abilities include not only his marksmanship and magical talent but also a remarkable capacity for emotional intelligence and smooth interpersonal skills.