Sumire, a nine-year-old girl with light hair swept into a ponytail, wide oval eyes, and bold eyebrows, dresses in a plain light frock layered over a dark shirt, paired with sneakers and sporadic accessories like a hairband. Her constant companion, Sunny Stefen Nozzo—a quill-covered marsupial with a gliding-ready fluffy tail—rests on her shoulder.

Renowned for her sharp intellect and impertinent wit, she outwits captors by crafting traps from scattered objects and deceiving pursuers. Defiant toward authority, particularly Dress agents, she employs theft or trickery without hesitation. Beneath her hardened exterior lies empathy, seen in her grief for civilian losses and her fierce loyalty to Ikuro Hashizawa, whose survival she psychically senses years after their separation, fueling her patient wait for his return.

Her psychic gifts—precognitive visions of danger, involuntary scribbling of encrypted codes, and communion with spectral entities—aid her survival. These abilities, coupled with unyielding endurance, let her withstand prolonged torture, including relentless sonic assaults.

Orphaned young, her talents drew Dress’s scrutiny after assisting police in a hit-and-run investigation. Captured and confined, she freed Ikuro, a host to the parasitic Baoh, forging a partnership to evade Dress’s hunters. Notable exploits include sabotaging train mechanisms to split carriages, exploiting precognition to secure race winnings, and enduring imprisonment as bait. Post-escape, an elderly couple adopts her, granting stability while her visions sustain belief in Ikuro’s survival.

Her journey shifts from lab subject to resilient fugitive, blending psychic prowess and cunning to thwart threats. The tale closes with her at seventeen, steadfastly awaiting Ikuro’s promised reunion, a testament to unwavering hope forged through strife and separation.