Kokoro's first name is written in Japanese hiragana as こころ, meaning 'heart' or 'mind'. This primarily comes to her lack of emotions, other than curiosity, as she would go beyond the morality of a normal human being when it came to researching them. LINUJ was also considering giving her a rank of 'E' instead. During the simulation she may have received a 'C' in score, but once Chapter 0 was released and her past with Mikako and Sojiro was revealed it lowered by a score. Physical ability is ranked with a 'D' (though LINUJ states that there was/still is consideration for scoring her with an E), a likely outcome of spending her entire life researching emotions. Behavior also was ranked with an 'A' due to her actions within the simulation such as attempting to persuade Emma Magorobi into helping the participants, finding the Void members, creating an SOS signal, and etc. Her score in intelligence was ranked a little lower than what may have been expected because of her short time in the game, and she would've presumably shown it more if she lived any longer, and was mainly ranked on her 'basic intelligence'. Two of Kokoro's highest scores go into reasoning power and intelligence both scored with an 'A'.

Her attire changes quite a lot, too, with Kokoro now wearing a long white labcoat that reaches past her knees, a black t-shirt, a pair of rouge pink tracksuit bottoms with white vertical lines down the sides, and an identical pair of the light blue 'Bonobono' slippers she wears during the game. It can be estimated that Kokoro's somewhere within her late thirties to early fourties. Outside of the simulation Kokoro's appearance is generally more uncared for compared to her VR avatar, with bags under her eyes and longer unkempt hair. Kokoro is always seen carrying a light purple iPad with her. In her illustration, she dons a white lab coat over her clothes. She also has a small wound on her right knee, which is concealed by band aid, and she wears light blue slippers resembling the cartoon character 'Bonobono'. Underneath her sweater, she wears a deep plum collared sleeveless shirt. She wears a long-sleeved loose maroon sweater with a light pink ruffled strap almost covering her shoulders, two braid-like embroidery flowing down her sweater, a black tie with an orange lower half where her previous school symbol is shown, and tight black shorts that reaches only the uppermost part of her thighs. She wears a pair of round, metal-rimmed red eyeglasses.

Kokoro's VR avatar has light yellow eyes and short, unkempt taupe brown hair with two long ear-like hair locks that stick up on both sides of her head. Gallery 📷 For more images of Kokoro, see Super Danganronpa Another 2/Image Gallery and Kokoro Mitsume/Sprite Gallery.

Hibiki kokono