Gabu, also sometimes referred to as Gabby or Gabu-chan, is a character from the anime Daemons of the Shadow Realm. She is a member of the Kagemori family and initially appears as an antagonist, being part of the group that attacks Yuru's home village of Higashimura in the first episode. Despite her small stature and youthful appearance, she is a formidable fighter and a Daemon user. Her full role places her in the morally complex grey area that characterizes much of the series' conflict.

In terms of personality, Gabu presents a fascinating contradiction. At first glance, she seems like a regular young girl, but she is capable of great brutality, having taken part in the savage massacre of the villagers at Higashimura without visible hesitation. However, as the story progresses, a more complex side emerges. She is not purely evil; she shows a kind and gentle side, most notably when she gently pats the head of Asa, her ally, who is crying after a difficult reunion with her brother. This mix of innocence and ruthlessness is a deliberate aspect of her character, designed to challenge the audience's perception of who the good guys and bad guys are. Her cheerful and sometimes mischievous demeanor, often shown with a grin, makes her violent actions all the more jarring.

Gabu's motivations are closely tied to her role within the Kagemori family. She appears to be a loyal operative who follows the orders of her superiors, such as the family head, Kagemori Genzou. Her primary goal in the early part of the story is to assist Asa in her mission to capture or confront Yuru, the protagonist. Her actions are driven by a sense of duty to her family and her allies rather than a personal vendetta.

In the story, Gabu serves as an antagonist and a direct physical threat to the protagonist, Yuru. She is one of the key figures from the Kagemori family sent to deal with him, showcasing the enemy's strength early on. Her role is significant in establishing the series' central conflict and its ambiguous morality, as her friendly interactions with her comrades stand in stark contrast to the violence she is willing to commit.

Her most important relationship is with her Daemon, Gabriel. Gabriel is Gabu's protector and a powerful being from the Shadow Realm. In contrast to Gabu's human form, Gabriel is described as a strange, dark mass of eyes and sharp teeth, or a face covered in eyelids. Despite its fearsome appearance, the Daemon is also noted to be played for "kawaii points" at times, reflecting its master's own duality. She also shares a close bond with her fellow Kagemori member, Asa, acting as a supportive and comforting presence for her.

There is a notable development in how Gabu is perceived. Initially, she is presented as a ruthless villain due to her actions in the first episode. However, the narrative quickly complicates this view. In following episodes, she is shown in casual, everyday situations, recovering and interacting with her allies like a normal person. This shift is not so much a personal change for Gabu but a deliberate narrative choice to force the audience to reconcile her capacity for both kindness and extreme violence, blurring the lines between hero and villain.

Regarding her abilities, Gabu is a user of Daemons, also known as Tsugai. Her specific Daemon is named Gabriel, and only a select few people are able to see it. This likely means she belongs to the lineage or group of people who have a natural affinity with the Shadow Realm. While the full extent of Gabriel's powers is not exhaustively detailed, it is described as possessing a formidable and frightening appearance, suggesting it is a powerful entity used in combat.