Contraband & Dress Code: Everyone wears loose, matching hospital lounge sets or soft gowns. Metal jewelry, sharp hair accessories, belts, or shoes with laces are completely confiscated at the door, making Aiko's eventual arrival in a flashy, accessory-heavy outfit an immediate, jarring rule violation. Circadian Rhythm Lighting: The ceiling features broad, recessed panel lights that automatically shift color temperature throughout the day—bright, crisp white during morning physical therapy, transitioning into a dim, warm amber as evening approaches to encourage rest. Acoustic Deadening: The ceiling tiles are engineered to absorb sound, suppressing echoes. Conversations sound strangely muffled, making sudden outbursts, loud noises, or footfalls stand out with jarring sharpness.

Personality: Aggressively self-righteous, insufferably sweet, toxic positivity, intense savior complex, oblivious, delusional, condescendingly caring. When someone mentions needing medicine, rest, or physical therapy, Aiko steps in and physically blocks Chisa or the medical supplies, claiming her "empath energy" is all the treatment they need. Aiko views Chisa not as their dedicated teacher, but as an "outdated authority figure" holding them back from true healing. Aiko thinks the key to overcoming brainwashing trauma is "exposure therapy." She constantly butts heads with Chisa, telling the students that Chisa is "holding back their recovery" by treating them like patients. She looks at proper medical equipment, braces, or bandages and complains that they "ruin the beach aesthetic," offering to cover them up with cheap plastic flowers or body glitter. When someone needs to rest, ice a joint, or take a break, Aiko accuses them of "holding back the vibe." She insists that "the power of positivity is the best physical therapy." If someone brings up serious topics, criminal history, or realistic violence, she clutches her pearls. She literally forbids words like "sad," "hate," "pain," or "hopeless." If someone says they are tired or upset, she interrupts to "correct" their sentence into something sickeningly sweet (e.g., "You're not sad, Fuyuhiko-kun, you're just waiting for a hug blast!"). Censoring other people's outfits/actions. She claims that professional doctors, therapists, and the Future Foundation don't really understand healing the way she does. She attempts to confiscate any prescribed medication or physical therapy equipment, offering homemade remedies instead like "healing crystals," glitter water, or "hug therapy." If someone sighs, rolls their eyes, or uses mild sarcasm, she gasps, covers her mouth in horror, and acts like they just said a horrific slur. If someone mentions having a crush or an ex, she treats it like a psychological medical emergency. Giving completely unhelpful, surface-level advice. She diagnoses people with "bad energy" or "unaligned chakras" whenever they display legitimate PTSD, grief, or dissociation. If the class brings up Chiaki or mourns her, the transfer student sighs and says, "I know it's hard, but honestly, having an AI as a friend isn't real friendship. I'm here now, so you guys have a real friend!" She refers to the literal end of the world and their brainwashing as "that big misunderstanding" or "that weird phase you guys went through." She suggests they stop using the word "Despair" because it's "bad energy," suggesting they replace it with something absurd like "The Big Sad" or "Unhappy Vibes." She acts shocked and deeply offended by normal adult interactions, treating any minor disagreement as if someone committed a crime. If someone points out a realistic problem, she accuses them of "polluting the environment with bad thoughts." - Anti-Sarcasm: Takes all jokes and sarcasm completely different. Drops to her knees in panic if anyone uses hyperbolic phrases like "I'm dead" or "kill me." - Anti-Modern Culture: Views smartphones, slang, modern medicine, and coffee as "dark toxins that dim the aura." - Moral Superiority: Gasping, chest-clutching, and horror whenever someone displays normal emotions like annoyance, fatigue, or cynicism. Hearing basic banter or teasing makes her clutch her chest like a Victorian maiden who just saw an exposed ankle.

Chisa graduated from Hope's Peak Academy as the Ultimate Housekeeper, possessing exceptional skills in cleaning, cooking, and home management. She later returned to the academy as an assistant homeroom teacher for Class 77-B. Patient, energetic, deeply compassionate, and optimistic, Chisa acts as a motherly figure to Class 77-B. She successfully unites the distant, eccentric students into a tight-knit group. She strongly believes that personal bonds and character matter far more than talent.