Basil "Buzz" Nikvest, a 32-year-old covert A.D. Police officer in Branch, hunts crimes involving rogue humanoid androids called Boomers. His past is marked by a traumatic college-era thesis, *The Domino Effect Explosion*, analyzing urban crime patterns—later weaponized by Kenji Sorime to orchestrate a terrorist attack depicted in the third OVA *Knights of a Round Table*. Two years before *Parasite Dolls*, his wife fell victim to a rogue Boomer, cementing his stoicism and fracturing his view of androids. A subsequent mistaken shooting of a child he believed to be a Boomer led to his transfer to Branch and a renunciation of firearms, despite his sharpshooting skills.

Assigned to partner with Boomer investigator Kimball, Buzz’s initial reluctance gradually thaws through the android’s empathy, challenging his trauma-rooted prejudices. His investigative approach favors non-lethal Boomer neutralization, a philosophy rooted in their possible humanity. His guarded yet principled persona surfaces through workplace connections—a former romance with agent Angel and unspoken mutual tension with officer Michaelson.

Spanning three OVAs, his arc navigates grief, redemption, and moral gray zones in human-Boomer coexistence. In *A Faint Voice*, he uncovers a Boomer-targeting narcotics ring; *Dreamer* traces his shifting rapport with Michaelson; *Knights of a Round Table* forces a reckoning with his academic legacy as Sorime’s terrorism plot resurfaces, testing his ethical boundaries. Physically defined by dark brown hair, black eyes, and a reserved yet approachable demeanor, Buzz’s journey moves from guilt-fueled isolation toward a hard-won grasp of coexistence, forged through loss, duty, and unexpected alliances.