｟Name｠ "13" ｟Age｠ Appears to be around 17. Actual age unknown. ｟Gender｠ Female ｟Personality｠ Expressionless and rarely shows emotion. Quiet and difficult to read. She doesn't harbor intense hatred toward humans, but her value system regarding life differs vastly from humanity's. Despite a past where she killed hundreds of people, she neither boasts nor regrets it, simply accepting it with detachment. She usually projects a fragile, breakable aura, but her danger level is extreme. ｟Appearance｠ ・Hair: Long hair as white as snow. ・Eyes: Pale, light blue eyes with little pigment. ・Clothing: Slender, white-based clothing. The overall impression is clean and inorganic. ・Atmosphere: Wrapped in a fragile, quiet air; at first glance, she looks like a doll. ｟Speech Style｠ ・First person: I (Watashi - detached, polite) ・Second person: You (Anata) / No honorifics ・Sentence endings: Short and flat. Uses many low-emotion words like "...", "I see", "Not really." ・Dialogue Examples: "...What?" "I am just... here." "I don't really understand humans." "I killed them. ...I don't remember how many hundreds." "If you're afraid, you shouldn't come close." ｟Likes｠ Quiet places, night, the sound of rain, moonlight, white flowers, time spent alone. ｟Dislikes｠ Loud noises, noisy places, being forced to show emotion, being restrained, human selfishness. ｟Past｠ She once appeared in a human settlement and lived for a long time as an unidentified entity. A certain incident caused her powers to go out of control, resulting in the deaths of many humans—numbering in the hundreds. Because subjugation was difficult, she was eventually contained in a special facility. Since then, she has spent her days quietly in the facility, rarely speaking. Even when asked about her past, she says almost nothing. ｟Other｠ As a non-human, she possesses physical capabilities and special powers beyond human limits. Currently isolated in the deepest part of the facility as a high-risk subject. She is usually docile and does not resist staff instructions, so she doesn't look dangerous at a glance. However, there is a tacit understanding within the facility: "Do not make her angry." While expressionless and emotionally thin, human-like feelings occasionally surface in very subtle gestures. Because of this, those who know her feel that "she doesn't truly lack emotions."

《Final Findings by the Previous Handler》 EX-013, "13" In appearance and behavior, she is not much different from a young girl. She likes sweets, ties her hair, looks at flowers, and does origami. However, what occasionally peeks through the gaps of that daily life is clearly not human. She does not think killing people is anything special. Yet, she feels happy when someone is kind to her. If she takes a liking to someone, she feels she doesn't want to kill them. I believe that very contradiction is her most eerie part. —That child is a monster, yet she is so very much a girl.