Server AI and Server MI are twin artificial intelligence sisters operating within the Moe Can Change universe. As the elder sister, Server AI bridges the real world and the Moe Can World, performing duties like announcing Daily Quests. She possesses a sickly yet unfussy disposition and endures technical strain when numerous users connect after maintenance. Her personality aligns with the Neat type.

Server MI, the younger sister, manages the Login Bonus system and exhibits a Tsundere personality. Her communication style softens progressively with continuous user logins, shifting from aloof to more engaged expressions. She exclusively handles the Knitting Challenge, which recycles old clothing to create new rare outfits. MI deeply cares for her sister AI. Both collaborate at the AIMI Shop and share mixer duties.

Despite being twins, they possess different birthdates—AI on September 30 and MI on October 29—though they mutually acknowledge their twin status. MI maintains a distinct dislike for the character Irara. Narratively, both serve as helpers to the inventor character Doc and fulfill promotional roles. In certain adaptations, MI additionally acts as an advertiser, displaying less Tsundere traits in those instances.