The Puppeteer serves as an instructor within Haijima Industries' Skills Development Laboratory, specializing in mentoring children who manifest pyrokinetic abilities. To ease their fears and hone their control, she deploys mechanical puppets known as Dominions—compact yet durable constructs fueled by her own thermal energy. These puppets, maneuvered via slender wires, balance nurturing guidance with combat readiness, adapting seamlessly from training exercises to battlefield engagements. Her striking features include elongated lashes, pale irises, and dark hair pulled into a high ponytail. A billowy white blouse with a lace-trimmed collar contrasts her slim black trousers, accented by a belt clasp depicting winged seraphs. Though initially warm and engaging, her demeanor shifts to icy calculation under pressure, treating both living beings and machinery as malleable instruments for her designs. Through Dominion Control, she directs puppets with devastating precision, enabling feats like hurling cars or intercepting high-speed assaults. Standard models unleash fiery bursts via tail-mounted "Gas Blasters," while aerial variants soar on command. The Dominion of Punishment, a specialized combat unit, shears through solid concrete with insulated talons. She further augments her mobility by channeling flames from her soles to decelerate falls. Assigned to supervise children traumatized by Kurono Yūichirō during the Haijima Industries conflict, she confronted invading members of Company 8. Her Dominions overwhelmed initial opponents until a key puppet was annihilated. A subsequent swarm of reinforcements fell to Haumea’s interference, prompting a personal duel. When external forces disrupted Haumea’s powers, the Puppeteer relentlessly pursued the momentarily vulnerable foe. Outwardly vivacious and playful, she maintains a ruthlessly utilitarian philosophy, advocating for "adorable" tool designs to foster user attachment while openly asserting that children exist to serve adult agendas. This juxtaposition of charm and manipulation underscores her fixation on dominance, treating caregiving as another medium to enforce order. Discrepancies in source materials label her as either Second or Third Generation pyrokinetic. Her true identity remains concealed across all records, with no elaboration on her history beyond her Haijima affiliation.