Aki Uihara, more widely known by her vigilante name Thunderoad, is the petite yet formidable former leader of the Knights of the Twin Towers, a peacekeeping group based in the Tokyo region known as Tokyo Always Comima. Her background is rooted in her role as the captain of this group, where she is recognized for her distinctive combat style and unwavering sense of justice. Despite her small stature, she dons armor and wields a massive sword, a visual representation of her formidable will and capability.

In terms of personality, Aki is depicted as a dedicated and earnest leader who takes her responsibilities seriously. However, she also possesses a relatable, more vulnerable side that emerges through her personal passions. She is revealed to be a devoted fan of a character named Rick, demonstrating an almost childlike enthusiasm that contrasts with her stern vigilante persona. This fandom runs so deep that she considered retiring as captain and selling her own precious stone, Drom Berserker, to acquire a life-sized Rick doll. This internal conflict between her duty as a leader and her personal desires is a key aspect of her character, showing that her motivations are not purely altruistic but also deeply human.

Aki's role in the story is central as the captain of the Knights of the Twin Towers. Her actions directly influence the plot, particularly when her leadership is tested by a crisis involving bomb threats. In a defining moment, she was tasked with bomb disposal and discovered that the explosive device was hidden inside the very Rick doll she had desperately wanted. Without hesitation, she chose her duty over her personal longing, slicing through both the bomb and her beloved doll to protect others. This event was orchestrated by Noriko Suzumoto, who was disguised as a member of the Dynamite Bombers. As punishment for the chaos caused, Aki appointed Noriko as the next captain, a decision that demonstrates her sense of justice and her unorthodox approach to leadership.

Key relationships include her bond with her constant companion, Garm, a one-eyed large-billed crow who is always by her side. Her relationship with Noriko Suzumoto is particularly significant, evolving from adversary to one where she entrusts Noriko with the future of the Knights. She also has a meaningful connection with Chiaya Misono, whose stone Aki briefly considered selling to fund her purchase of the doll, an act that forced her to confront her own motivations.

Aki undergoes notable development throughout her arc. Initially torn between her personal obsession and her public duty, she ultimately reaffirms her commitment to her role as a protector. Her decision to sacrifice the Rick doll and step down from her captaincy, choosing to continue her journey as a regular member of the team, marks a maturation of her character. She learns to balance her personal passions with her responsibilities, ultimately prioritizing the safety and well-being of her community over her own desires.

Regarding her abilities, Aki Uihara is a formidable fighter whose signature moves are famed for being gentle to mobs. This unique trait ensures that her finishing attacks never harm background characters or bystanders, only the intended targets. This precise control over her immense power has become her trademark and a source of admiration among the people she protects. Wielding her large sword in conjunction with her stone, Drom Berserker, she exemplifies a warrior who values precision and the safety of innocents as much as defeating her enemies.