Tendou Kei

Kei initially presented as an AI program concerned only with "guiding the Princess to her throne" and enacting the destruction of Kivotos and the genocide of its people through the construction of the Ark of Atra-Hasis. Ever since her Princess decided she wanted to be a hero instead, Kei prioritizes Alice's safety above all, sacrificing herself to keep her alive before being reborn through the assistance of Rio and Himari.

Ever since, Kei has begun developing more emotions, displaying a somewhat caustic personality towards the rest of the Game Development Department and blatant tsundere tendencies, especially towards Sensei. Her hot-headed nature has been so unsubtle that members of the SPTF acknowledge her constant anger. However, beyond everything, her will to live on has grown stronger than ever. She considers the capabilities of Decagrammaton and its prophets to be barely a fraction of what her creators could do. She has taken different forms throughout the main story after certain events, first as a seemingly inert keychain that contained her preserved backup data (named Kei.SAV). During operations against Decagrammaton, her data was uploaded into a custom-built AMAS drone provided by Rio, with a single boxy screen displaying her "face" atop a single tire and with a pair of three-fingered manipulator arms. Eventually, she was able to acquire a humanoid form after pilfering an unused body from a facility under the control of Netzach and uploading her consciousness to it. Through Alice's authority, she sheds the physical traits associated with Decagrammaton and its units and becomes her ideal self, gaining a more human appearance. Her skin is pale, and her hair is almost as long as Alice's. The principal differences are in its white coloration compared to Alice's black, and the center bang hanging in the opposite direction (rightward relative to her perspective). Her original pink eyes are preserved from back when she took control of Alice's body, but bear a much sharper, tsurime appearance. In her current form, her clothing is very reminiscent to that of her clubmates in the Game Development Department, mainly Alice's, with some slight differences, such as the inner section of her jacket being colored in a strong, almost fluorescent shade of pink and the fact she's wearing a dark gray colored blazer underneath. In addition, her skirt is noticeably shorter than Alice's, and instead of socks, she wears thigh-high stockings. Alice's personality was originally robotic when first discovered, referring to systems, data files, and search queries when talked to. It underwent a dramatic shift literally overnight as a result of playing the JRPGs that the Game Development Department had available, and as a result, she experiences a variant of "chuunibyou syndrome" where she sees herself as the hero of her own story. She often peppers her speech with terms from JRPGs as well, referring to her friends as her "party" and daily tasks as "quests". Aside from this, she is often curious and sweet-natured, easily making friends and eager to learn about the world around her. Her skill at arcade games is only exceeded by Yuzu. Until relatively recent events, she had a fear of maids due to a brutal confrontation against Neru.

By the time Aris experienced her lifetime with her group, it is clear that Alice had become more determined and eager to save someone in need or clear quest together with the club she's in. She has absurdly long glossy black hair reaching the floor and tied to a headband and clip on her left side. A long bang is running down between her eyes, joining the rest over her left shoulder. She has pale skin and glowing blue eyes, which share some similarity to camera lenses. She wears a standard Millennium high-school uniform, including a white and blue hoodie, a tucked-in white shirt with blue tie underneath, a pleated, black skirt, a pair of woolly socks, and white sneakers with gray shoelaces.

It is noted that her Millennium access badge was artificially crafted by the Veritas and her clothes were hand-me-downs from Midori.