Akihito Tsuwabuki is a character from the anime BBK/BRNK. He is visually recognized by his blond, ear-length hair and gray eyes, and he is typically dressed in formal attire that includes a suit, tie, vest, gloves, scarf, and glasses, often with a single bang of hair framing his face. His background is tied to a family of treasure hunters, as he is the son of Takehiko and Nono Tsuwabuki and the younger brother of Hisui Tsuwabuki.

In terms of personality, Akihito is initially portrayed as shy and timid, often feeling overwhelmed by the circumstances he faces. Despite this, he possesses a strong inner resolve and becomes determined and courageous when the safety of his loved ones is at stake. He is deeply loyal and protective, sharing a profound emotional bond with his older sister, for whom he is willing to take great risks. He also strongly believes in the power of teamwork and works to develop his capabilities as a leader.

Akihito's primary motivation throughout the story is to protect those he cares about and to shoulder the responsibilities placed before him, including a mission to save the world alongside his companions. His role is that of a main character and an aspiring leader of his group. As the narrative progresses, he experiences significant character development, striving to overcome his initial timidity and become a more effective and decisive leader.

His notable abilities are centered on his combat skills using a Buranki named Oubu. Oubu takes the form of a pair of giant gauntlets that can transform into a powerful cannon. Akihito demonstrates a high level of proficiency with this weapon, capable of unleashing strong attacks, and he possesses a deep understanding of its capabilities, constantly seeking ways to improve his combat techniques.