Mio, once legendary as the Black Spider of Calamity, terrorized the world for centuries as a mindless beast driven solely by endless hunger and destruction. No individual or army ever achieved true victory over her; encounters ended only when her hunger was temporarily sated, forcing retreat. Her first definitive defeat came against Makoto Misumi in the dimension of Asora. During this battle, she developed an unsettling fascination with the pain from his attacks and the taste of his blood. Makoto incapacitated her but collapsed afterward. While he was unconscious, Tomoe Misumi convinced Mio to form a servant contract with Makoto, irrevocably altering her existence and expanding Asora, creating new geographical features like forests and rivers. This contract transformed Mio into a humanoid form: a black-haired woman with golden eyes, often dressed in a black-red kimono, though subtle remnants of her arachnid origins occasionally surface. It quelled her insatiable hunger and catalyzed profound psychological development. Her animalistic drive was replaced by complex emotions and intellect, shifting her focus from mindless consumption to dedicated service and culinary passion. She developed unwavering loyalty to Makoto, viewing him as her master and primary source of fulfillment. Her central motivation became cooking for him, striving to bring him happiness through meals. She learned Japanese cuisine techniques from Hibiki Otonashi, though she does not recall Hibiki's identity. Exposure to Makoto's Earth memories via Tomoe's powers sparked additional interests in Japanese pop culture, particularly tokusatsu and anime series. Her abilities evolved significantly through contract stages. Initially possessing Superhuman Physical Characteristics, Longevity, Flight, Magic, Enhanced Senses, Magic Absorption, Mid-High Regeneration, and Purification, her powers expanded post-contract to include toxin cleansing, plant communication, Web Manipulation, a Fear Aura inducing paralysis or unconsciousness, Telepathy, Teleportation, Portal Creation, Mist Manipulation, Summoning Asora natives, Darkness Magic, Healing, Sleep Manipulation, High-Mid Regeneration Negation, Limited Telekinesis, and Non-Physical Interaction. She also gained extensive Resistance to numerous magics and status effects. Further development granted Stealth Mastery erasing physical and magical presence, Damage Transferal/Attack Reflection, inducing Apparent Death, Power Mimicry recreating witnessed magic, Phasing through solids, and Information Analysis for "ingredients" including poisons. Notable techniques include "Death Needle" to simulate death by halting bodily functions and "Mist Gate" for interdimensional travel via mist portals, which functions as a supernatural ability immune to magic nullification. Her combat tier evolved from Town level before the contract to Small Country/Country level post-contract, reaching Country level+ in her "Long Haired" state after manipulating Root's Blaze. Her Adventurer's Guild level is recorded as 1,500. Mio interacts dynamically within Makoto's circle, sharing a competitive yet familial bond with Tomoe. They often clash over tactics but remain united in devotion to Makoto. She commands four arakei (half-spider beings) residing in Asora. While fiercely protective and strategically brilliant in combat, she rarely summons allies unless facing opponents of vastly disproportionate strength or for specific objectives. Her past as the calamitous spider fades from active memory, leaving only echoes of her former hunger, replaced by contentment in her culinary pursuits and service.