Mikimoto appears as a student at the Academy and a member of the school swim team within the Bible Black franchise, featuring in the first and second games (*Bible Black: La Noche de Walpurgis*, *Bible Black: The Infection*) and the *Bible Black: Only* OVA series. She possesses blond hair styled in twin tails, blue eyes, a slim build, and a pale complexion, typically depicted wearing the team's sports swimsuit. She functions almost exclusively as a lackey to swim team captain Shinobu Kobayashi, demonstrating unwavering loyalty by following Kobayashi's orders without question. This dynamic defines her role, particularly in their shared harassment of fellow swim team member Miyuki Nonogusa, whom Kobayashi resents out of jealousy. Mikimoto participates in cornering Nonogusa in the locker room, assisting in tying and gagging her. Under Kobayashi's direction, she uses a vibrator during the harassment and takes compromising Polaroid photographs for blackmail, threatening to release them unless Nonogusa quits the team. This pattern continues in the *Bible Black: Only* OVA, where Mikimoto and Kobayashi abuse Nonogusa before being joined by Mika Ito and her boyfriend, escalating into a group orgy. Her interactions primarily stem from Kobayashi's initiatives. When subjected to magical arousal spells or mind control, such as those cast by Taki Minase or Reika Kitami, Mikimoto engages in sexual acts with Kobayashi and others, though her compliance may be magically influenced. In one game storyline, after Kobayashi is brutally assaulted by Minase, Mikimoto reacts with shock and pleads for mercy alongside Nonogusa before being raped by another character. Mikimoto's character lacks significant development or independent agency across all appearances. Her narrative function remains tied to her subservience to Kobayashi, whether in bullying contexts, sexual situations under magical influence, or as a victim. She is the only named female character in the franchise whose first name is never revealed.