Kobeni Higashiyama

Kobeni is generally demure, soft spoken, and often anxious. She is exceptionally cowardly with few moments of courage. Her first confrontation with the Eternity Devil leads to her being paralyzed with fright and babbling. She is shown to easily crack under pressure and breaks down in tears when the group becomes trapped in the hotel and she is confronted with the possibility of them all starving to death without any rescue. Her fear can also make her remarkably clumsy. Her sense of fear causes her to take drastic action in order to save herself such as turning on Denji and threatening him at knifepoint once a Devil promised to free her in exchange for Denji's life. She even went as far as accusing Hirokazu Arai of being a spy for the Devils because he defended Power from Kobeni's delusional accusations. Despite how she acted towards them in her panicked state, she did feel remorse for her actions and gratitude towards Hirokazu for shielding her when they were attacked. However, when Kobeni gets into action she had proven to be cool-headed and efficient, ruthlessly dealing with both the Katana Man and Akane Sawatari and forcing them to retreat; only breaking down in a panic once the fighting is over. Despite being forced into a line of work that she hates by her family, Kobeni still cares about them as she sends her money to her brother to support him through college and chauffeurs her family around in her car. And despite wanting to quit, she initially stays because it was the day she was going to receive a bonus. Kobeni is shown to be skittish when hugged repeatedly by Himeno, but tolerates her antics. Kobeni is shown to enjoy alcohol, especially when it is paid for by someone else. Her hobby is to eat tasty things. She loves the flavor of ice cream which she has only experienced three times in her life.

Kobeni is a young woman with short brown hair (in both the anime and colored manga) that is tied in a ponytail with bangs/a shoulder-length hair strand hanging on the right side, brown eyes with white pupils and she has four moles on her face; two under her left eye, one on the lower right side of her mouth and one on her left cheek. She normally wears a professional suit and she has two red hair clips on the left side of her head. At the newbie welcome party, she wore a hand-me-down dress from her older sister which was considered to be cute by a couple of other Devil Hunters.

According to Himeno, Kobeni is talented, but she is held back by her timidness. This is later proven true when Kobeni manages to single-handedly defeat the Katana Man in his human form and forces Akane Sawatari to retreat.