Based solely on the provided description, Yū "Biko" Abiko is a character from "Muhyo & Roji's Bureau of Supernatural Investigation." She studied at Magic Law School with Toru Muhyo, Soratsugu Enchu, and Yoichi Himukai. Though she failed English and Japanese classes, she displayed exceptional talent in Science. Initially disliking her teacher Rio Kurotori, her feelings transformed dramatically during a classroom experiment. When Biko poured chemicals incorrectly, causing an imminent explosion, Rio pushed her to safety and sustained injuries. This sacrifice ignited deep admiration and loyalty in Biko, leading her to become Rio's apprentice. She trained as an Artificer, specializing in creating magical tools. Biko has a short stature, medium-length blond hair, and red eyes. She consistently wears an orange hat, a green scarf, and a long, ankle-length striped dress. The hat often causes others, like Roji initially, to mistake her for a boy until it's removed. Her personality combines dedication to her craft with a tendency to unintentionally zone out. She dislikes long discussions and carbonated drinks, but enjoys cheese gratin (especially Rio's), raisin bread, fruits, and particularly strawberries. She possesses a talent for cleaning and repairing objects through disassembly, though she dislikes physical activities like running due to her heavy bag. As an Artificer, Biko excels at crafting magical tools but cannot use them herself, a limitation of her role. Historically known as alchemists, Artificers typically wear large hats or tie back their hair to maintain cleanliness while working. Biko's creations include the legendary Temper Root Water, Portable Magical Law Seals, Magical Traveling Seals, smoke bombs, Ren Source Spring (a restorative magical beverage), and Yuurenmin Merry (a tool accelerating magical energy recovery). Her expertise grew until she operated independently of Rio, mentoring three apprentices. Her devotion to Rio remains unwavering, even after Rio's betrayal and alliance with the antagonist Enchu. Biko actively advocates for Rio's redemption, often expressing a wish to pick strawberries together as a symbol of hope for reconciliation. Following Rio's exposure as a traitor, Biko experiences shock and heartbreak but persists in believing Rio can reform. After Rio's imprisonment, Biko assumes responsibility for her, and they live together under house arrest, reflecting her enduring loyalty. In the sequel manga, "Muhyo & Roji's Bureau of Supernatural Investigation: Magical Genus Magic Tool Master Chapter," an extra comic depicts Biko with romantic feelings toward both Rio and Enchu. Her involvement in key events includes being poisoned by a rain dog during the Arcanum incident (from which she recovers) and participating in confrontations against supernatural threats alongside the main protagonists. Biko's surname, Abiko, translates to "my grandson" (我孫) combined with "child" (子). Her given name, Yū (優), signifies "excellence," "superiority," or "gentleness."