In the reimagined series Kamen Rider BLACK SUN, the Bat Mutant, whose human name is Komori, is a long-standing figure within the world of monsters. He is a broker and informant who has been active since the founding of the original Gorgom organization fifty years before the main events of the story. His primary role is not as a front-line warrior but as a neutral party who gathers information and offers his services to various factions, including the Gorgom Party and Kotaro Minami, depending on where his best interest lies. His personality is defined by a strong sense of self-preservation and opportunism. Komori is a talkative and somewhat pretentious character, often ignored by other monsters due to his lack of strong ideological commitments. He represents a more cynical and pragmatic perspective, believing that survival is paramount and that one must always leave an escape route open by not fully committing to any side.

Despite his outwardly selfish demeanor, Komori is not inherently evil. He maintains a friendly, long-standing relationship with the Whale Mutant, Kujira, as both found themselves in similar subordinate positions within Gorgom's hierarchy. This connection proves significant, as Komori is secretly moved to help Kotaro Minami on multiple occasions when he is in mortal danger. He takes considerable risks, knowing that being caught aiding Kotaro would brand him a traitor. This secret compassion reveals a core of loyalty and a sense of justice that contradicts his self-serving talk. His motivations evolve over the course of the narrative; while he begins as a simple survivor looking for the safest position, he is ultimately inspired by Kotaro and the younger generation of monsters. In the final acts of the story, he abandons his neutrality entirely, actively helping Kotaro and Aoi Izumi. He even participates in a critical mission to assassinate the Prime Minister, solidifying his turn from a passive observer to an active participant in the struggle for monster rights.

In terms of abilities, the Bat Mutant is distinguished as one of the few monsters in the series capable of flight. He uses echolocation to navigate and track specific individuals, which makes him an excellent scout and surveillance agent. However, his flight is portrayed as clumsy and unstable; he often stumbles when taking off, struggles to maintain his balance in the air, and lands heavily. This physical awkwardness adds to his characterization as a less-than-imposing figure who relies on his wits rather than raw power. A unique visual trait in his monster form is that the skin of his human face remains visible on the back of his neck, a haunting reminder of his humanity. He uses his claws and fangs for combat when necessary, but his true strength lies in his network of information and his ability to survive by navigating the dangerous political landscape of the monster world.