Moeka Kiryu

Moeka Kiryuu (桐生萌郁, Kiryū Moeka) is a tall girl that Rintarō bumps into in Akihabara. She is on a search for the IBN 5100 personal computer.

Personality
Moeka is extremely shy, her preferred form of comunication being via text messaging even if the person she is "talking" to is right in front of her. As such, she is very protective of her phone and becomes agitated if someone tries to take it from her hands. Amusingly though, her messages are very lively, often using stars, hearts and musical symbols to convey an upbeat feeling.

Moeka seemed more or less interested in Rintarou, calling him Okabe-kun, and constantly sends him emails as attempts to talk to him, though this is unclear if she wants his company or simply because she has been ordered to. Her habit of constantly spamming his mailbox with lengthy SMS's made Rintarou ignored them, much to her dismay.

In one of the drama CDs, Moeka narrates a message she sent and sounds like a completely different person.

Moeka can apparently type and send SMS's at the speed of normal speech, which leads to Rintarou calling her "Shining Finger" (Masseuse in the game).

Background
(SPOILER ALERT)

Moeka fell into a deep depression for an unknown reason and decided to kill herself. At that moment she received a mail from the enigmatic FB, changing her life forever. Seeing FB as the person that gave her life meaning, Moeka devoted every waking moment to carrying out her given orders, developing a dependancy on FB and the mails provided. While she is capable of carrying out atrocities for acceptance, Moeka strives to be loved and has the potential to be a good person if led in the right direction.

Her blind devotion to FB is fruitless, however, as she was considered no more than a pawn on SERN's board and are "expendable".

Trivia

 * Moeka has her own route in the new visual novel, Steins;Gate: Hiyoku Renri no Darling, which even further displays her interest in Rintarou.
 * Though reluctant, Moeka stole Rintarou's first kiss.