Tao hails from the Momotaro story zone, his background rooted within that narrative. He maintains a connection to the previous Momotaro, a relationship shaping part of his personal history.

He possesses a blank Book of Fate, an abnormality setting him apart from the inhabitants of his world whose lives follow predetermined scripts. This difference leads to societal ostracization, compelling his departure from his original story. Tao joins fellow blank book holders—Ex, Reina, and Shane—forming a group united against the Chaos Tellers who corrupt stories by rewriting Books of Fate.

Tao exhibits a dashing and big-hearted personality. He regards Reina as a fine lady and commits to accompanying her journey to undo the Chaos Tellers' damage. His bond with Shane is defined by a vow of brotherhood; he considers her his surrogate little sister and treats her as family, underscoring his protective loyalty.

Functionally, Tao serves as a Defender class character in combat, focusing on protective actions within the group. The team journeys across various Story Zones, including those based on Don Quixote, Momotarō, and Aladdin, working to restore narratives to their intended paths. His participation is integral to the group's efforts to stabilize disrupted stories.