OVA
Description
Asagi Aiba, a central character experiencing significant development throughout the Strike the Blood series, begins as Kojou Akatsuki's human classmate at Saikai Academy. Renowned for her exceptional programming skills and employed part-time at the Itogami Island Management Corporation, she operates under the online alias "Cyber Empress." Her mastery of hacking and deciphering complex codes is aided by the artificial intelligence Mogwai, whose deeper purpose remains unclear.

A notable personality shift occurred during her middle school years, transforming Asagi from a sensible, mature girl into a more flippant, flirtatious, and stylish individual. This change directly stemmed from meeting Kojou Akatsuki, revealing the depth of her feelings for him. She often displays a tsundere-like attitude towards Kojou, prone to jealousy, especially concerning Yukina Himeragi's romantic interactions with him. While typically cheerful and frivolous, a hidden solemn and deductive side emerges during grave situations, demonstrating her commitment to aiding others.

Crucially, Asagi harbors the hidden identity of the Priestess of Cain. This role grants her practical immortality while on Itogami Island, which functions as Cain's altar and ritual ground, ensuring her survival against any fatal means. Her extraordinary programming prowess and connection to Mogwai are strongly suggested links to this heritage, a significance recognized by Meiga Itogami within the supernatural framework.

Her abilities center on enhanced hacking. During intense programming sessions, her eyes become surrounded by a red light and her finger movements achieve extraordinary speeds. This allows her to hack entire corporations using a standard laptop, fend off coordinated cyber attacks, and decipher complex codes like those required to activate the ancient weapon Nalakuvera. This skill proved vital when terrorists forced her to activate the Nalakuvera to save friends, though she later devised a countermeasure to stop it.

Her relationship with Kojou forms a core part of her story. She harbors strong romantic feelings for him since their middle school days, considering him her best friend alongside Motoki Yaze, who often encourages her pursuit. Her interactions frequently involve attempts to get closer to Kojou, complicated by Yukina Himeragi's presence. Official media, including the light novels and Strike the Blood EX storyline, confirm their eventual marriage and the birth of their daughter, Moegi Akatsuki.

Asagi's involvement in key events includes being kidnapped to activate the Nalakuvera, participating in school activities like the sports festival badminton games (where she wore specific athletic attire), and collaborating with Kojou in scenarios such as the Art Club where they took photos of each other in costumes. Throughout various arcs, she consistently leverages her intellect and resources to support Kojou and protect Itogami Island, gradually becoming more aware of the supernatural elements surrounding her friends and her own role within them.