Kokoro has long blond hair, with a desaturated blue bow on her back. Her eyes are a dark grey, and she wears dark pink lipstick. She is often seen wearing a pink top, and a pink sweater-dress over it. She wears desaturated pink gloves.
Kokoro has the Social Evil persona. If she witnesses murder alone, she will grin and run off. If she witnesses murder in a crowd, she will run away and pretend to call the police.
Kokoro is very manipulative and cold to her "victims". She will act nice around others, but when alone with her victim, she will mentally torture her victim. This is shown by her actions around Akio Nakai, who was one of her victims. Overall, she's a bitch who should die. I'm not killing her off for reasons.