Tsukatsuki Rio

Rio has always been unsociable and rather scrupulous. She never lets emotions change her mind and always sticks to the facts. Because of this, a lot of students find Rio to be terrifying, but Rio doesn't let their opinions into her head. Rio is also very determined when it comes to reaching her goals, even breaking the rules if she has to.

She’s extraordinarily cold and heartless whenever it comes to the truth. She won’t hesitate to say things how they are; even going so far as to outright tell somebody they’re going to die within a battle if she sees them as “unfit” or “too weak”.

Rio's character can be described as an utilitarian, willing to sacrifice one for the many if it's deemed as the most rational choice possible. She often brings out the trolley problem, a well-known problem about a person in control of a lever that can lead a trolley to two different paths, one with a singular person on the rails and the other with multiple. For Rio, the most rational answer is sacrificing one to save multiple, disregarding any other possible choices.

Rio is also considered as an extremist towards her beliefs, forcing anyone to follow what she believes to be the correct path and fighting against anyone who disagrees with her as she deems them to only be a thorn on her plans. The most apparent example is her rivalry with Himari Akeboshi, the ex-president of Veritas, a club of hackers. Himari knows Rio's plans always end up leaving behind a terrible mess. The most recent occasions were no different, and Himari is always responsible of picking up her mess. However, despite ignoring people's opinions about her, such as claiming her to be a heartless villain, Rio wishes for others to understand the truth behind her doings.

One of her biggest flaws is her self-righteousness, thinking what's she's doing is the most rational solution and therefore the most correct solution, disregarding other people's opinions or aid and forcing them to follow her path. However, despite her cold and forceful personality, she actually has a kind heart although she can't express it properly, and it ends up causing problems for others. She spends most of her time researching about the Nameless Priests, a mysterious faction that is supposedly going to bring upon the destruction of not only Millennium, but also Kivotos.

Rio has the appearance of a 19 year old female, with a rather curvaceous body, focusing mainly on her wide hips and rather thick thighs. She oftentimes does exercises to further increase her voluptuousness, however she doesn’t typically flaunt her curves, as she’s simply not that type of person. Rio has blood red eyes, with a halo floating above her head. The halo has a pitch black circle running around it, with the inner workings of the halo seemingly being in the shape of an S that has been cut in half. The inside of the halo is blood red in color. Rip has long, silky-smooth black hair that extends past her thighs. She wears a millennium hair pin.