Five is a very young monster, that was rescued by Nino not too long after he woke up in the forest. She was found scared and alone, scratching at herself uncontrollably. She was saved by the power of Nino's Healing Hands. Five claims that her name was "assigned" to her, likely by the scientists in The Lab. Her current goal is to find a way to return home, which she seems to have fond memories of.
Five is a young kid with a frail frame, likely due to her background as a sickly child. She displays traits common to monsters, such as bright red eyes, common pointed horn, and little sharp fangs visible whenever she shouts. She has pale skin, more pale than any known character. She has dark indigo blue hair, cut short and curving around her head. Her bangs fall messy and frame her face, giving her a very youthful appearance. She wore a purple one-piece dress that was a bit ripped and torn around the edges, possibly from damaging herself during her "transformation". She also wore a flower crown made from five purple flowers, which was later replaced by a crown made of three yellow flowers by Nino.
Initially, when Nino found her during her "transformation", she looked grim and more beastly. Her hair looked muddy, and her arms and legs had entirely changed to black claws. She had inflicted many scratches and injuries on herself, which were healed up slowly and then completely by Nino's ability.
During her days in the lab, she wore a green hospital gown with green slippers, and had longer hair that was tied in two low twintails to the sides.
After meeting Aria, she now wears a poofy black dress given to her from Aria herself, and a pair of black shoes, along with the same yellow flower crown that she got from Nino.