Rio Kamichika

Rio Kamichika (神近 莉緒, Kamichika Rio) is a female classmate of Masaomi Kida.

She catches her father cheating on her mother and starts having thoughts about suicide.

Her online chat name is Magenta and she is a member of Dollars.

Background
After she discovered that her father was cheating on her mother, Rio began thinking about what happened if she disappeared. While online in a chat room, she runs across someone who goes by the name "Nakura" (who is none other than Izaya Orihara) who wanted to disappear as well. Feeling a connection with him, Rio begins chatting regularly with Nakrua. She tells him about her problems, and he bears his soul to her, as well. One day, while Rio is sitting in her room, she receives a mesage from Nakura, asking if she wanted to disappear with him.

When she leaves her house, Rio feels confident about her decision. She wants to see the face of the person who feels the way she does. Out on the streets of Ikebukuro, a man approaches Rio, claiming to be Nakura. She follows him into an alley, and ends up being kidnapped by the man and two of his friends. She is thrown into the back of their van and knocked out, not knowing that Izaya was the solitary witness. Celty Sturluson ends up coming to Rio's rescue in order to give her a message that someone is waiting for her on the roof of a building. When Celty drops her off, Rio heads up to the roof and finds the real Nakura, Izaya Orihara.

Izaya goes on to mess with Rio, telling her that he is the one who had her kidnapped, but also the one who had Celty save her. Rio asks him why he did it, but Izaya just gives her a cryptic answer: because he likes humans. Izaya then brings Rio to the edge of the building, asking her if she still wants to disappear. He tells her to look down at the ground, where she sees the blood stain of the last person who committed suicide. He tells her that, if she jumps, her odds of survival are slim. He also says that the suicides stem from different problems, but that all those people leave the world in the same way.

Izaya's words upset Rio and she tries to slap him. However, she misses and almost falls over the edge. Izaya grabs her by the wrist and lets her look down for a bit, as he is the only thing keeping her from falling. He asks if he should let her go, and she doesn't answer. He proceeds to bring her back to the safety of the roof, and walks away, saying that this whole ordeal was boring because it went exactly according to his plan.He then tells her that she's just as ugly as the rest of the world, and leaves her on the roof. Rio thinks about jumping, but she hesitates. In the end, she jumps anyway, only to have Celty help her again by using the shadow of the stairs to break her fall. Rio then asks why she saved her. Celty responds with a message that says "Because the world isn't as cruel as you think."

Afterwards, Rio decides to forgive her parents. She changes her point of view on life and decides she wants to share those words with someone someday.