Clair Aoki is an attractive young girl with fair skin and striking features. She has upper-back length light brown hair, with bangs that fall neatly over her forehead, and expressive brown eyes. Notably, she has freckles that span across her face, adding to her youthful charm. Clair’s figure is well-developed, even more so than her older sister’s, giving her a mature presence for her age.

In her casual home attire, Clair is often seen wearing a simple shirt and panties, reflecting her laid-back demeanor when not in her more active roles. When acting as the “pilot” in the series, she wears a dark blue one-piece swimsuit, which serves as part of her functional outfit in the unique situations she faces alongside Shuichi Kagaya.

Clair Aoki is a deeply conflicted and complex character. The traumatic experience of witnessing her sister transform into a monster and murder her family, while being disbelieved by those around her, drives Clair into a state of emotional turmoil. This despair reaches a breaking point, and she even attempts suicide, feeling utterly lost. However, after being saved by Shuichi Kagaya in his monster form, Clair’s understanding of the world shifts. She comes to realize that monsters are real and resolves to find her sister, who is at the heart of her personal torment.

Initially, Clair views Shuichi as nothing more than a monster, directing both verbal and physical abuse toward him. She blackmails him and uses him as a tool for her own purposes. Over time, however, Clair discovers that Shuichi is not a mindless creature, but someone who fears becoming a true monster. This realization shifts their dynamic, and Clair forms a deep emotional bond with him, even vowing to die alongside him if he ever does, to prevent him from being alone. This bond evolves into a romantic relationship as they continue to face the trials of their journey.

Clair’s single-minded determination to find her sister leads her down a darker path, where she becomes willing to take extreme measures, including killing others. She demonstrates a chilling ability to suppress her emotions and act with cold, calculated precision when necessary.

Despite her darker tendencies, Clair also has a lighter, more shameless side. She can be surprisingly perverted, often undressing in front of Shuichi and making lewd jokes. Her comfort with her own body and Shuichi’s proximity becomes apparent when she casually discusses the idea of entering his body naked to avoid ruining her clothes, even though she compromises by wearing swimsuits to make him feel less violated. This balance of intense emotion and playful, uninhibited behavior adds depth to her character, making her both vulnerable and complex.

Clair Aoki, overwhelmed by the despair of losing her sister and being rejected by those around her, attempts to end her life by starting a fire. However, her life takes a turn when she is unexpectedly saved by Shuichi Kagaya. As she regains consciousness, Clair is shocked to see Shuichi in his monster form, which only deepens her confusion and curiosity about the creatures she had once only heard of.

The following day, Clair encounters Shuichi at school. She shows him her phone and casually reveals that she saw him transform, expressing her growing interest in monsters like him. Determined to learn more, she confronts him on the roof, but when Shuichi denies being a monster, she pushes him off the edge. As he falls, Shuichi transforms once again, and to Clair’s surprise, he jumps back onto the roof, unharmed. This moment sparks a series of questions, and Clair threatens to expose his secret. Shuichi, however, insists that he does not understand his transformation and that it was something that just happened to him one day.

During their walk back to her apartment, Clair introduces herself properly and shows Shuichi a mysterious coin she had found, but he has no answers for her. Once inside her apartment, Clair opens up about her search for her sister, who, much like Shuichi, has become a monster. This revelation further strengthens Clair’s resolve to uncover the truth about her sister and the monstrous world she now finds herself entangled in.

The first name “Clair” is derived from the kanji 紅 (kure), meaning “crimson” or “deep red,” and 愛 (a), meaning “love” or “affection.” The combination of these meanings evokes a sense of passionate love, tying into her emotional depth and complex character.

Clair’s surname, “Aoki,” is composed of the kanji 青 (ao), meaning “blue” or “green,” and 木 (ki), meaning “tree” or “wood.” The name suggests a natural, grounded connection, symbolizing growth and life, which contrasts with the darker elements of her journey as she navigates the world of monsters.