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, she always thought about what happened if she disappeared. She accidentally finds someone online in a chat room who goes by the alias "Nakura" (who is none other than Izaya Orihara) that wanted to disappear without a trace as well. Rio feels a connection between Nakura and herself and starts to chat online regularly. Rio tells Nakura about her problems and Nakura tells Rio his problems, as well. One day, Nakura asked Rio if she wanted to disappear with him.

Rio feels confident when she leaves her house. She wants to see the face of the person that feels the same way as her. A person who claimed to be Nakura appears and takes her to a van. It turns out she was tricked and "Nakura" kidnaps her with the help of his two friends. Although it seems that no one sees, Izaya turns out to be the solitary witness. Celty Sturluson ends up coming to the rescue of Rio in order to give her a message that someone is waiting for her on the roof of a building. Rio walks up and finds the real Nakura, Izaya Orihara.

As usual, Izaya plays around with his victim's thoughts, telling that he is the one who told the guys to kidnap Rio, but also the one who told Celty to save her. Rio gets confused at this. She asks him why he did it, but Izaya just gives a cryptic answer: because he likes humans. After that, Izaya brings Rio to the edge of the building. He told her to look down to see the blood stain of the previous suicide. Izaya then told her that if she jumps, this is what will happen. he says that the suicides start out from different problems, but they all leave the same way.

Izaya's words upset Rio and she tries to slap him. However, she misses and almost falls. Izaya grabs her and lets her look over the edge 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. After this, he 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 steel stair's shadows to break her fall. Rio asks why she saved her. Celty responds with a message that says "Because the world isn't as cruel as you think."

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