Mikuru Katsuhara, nicknamed Micchon or Mi-tan, was born April 19th and is 21 years old during the depicted events. She has brown hair and brown eyes. Her typical outfit includes a white shirt printed with the word "earth", dark blue or purple jean shorts, dark pink tights, and white boots. She frequently wears a pink hair clip and sometimes adds a blue coat. Her surname Katsuhara combines the characters for "arrowroot" (葛, *katsu*) and "field" or "plain" (原, *hara*).
She works as a computer programmer for Eden of the East and developed the group's eponymous image recognition software. This software identifies objects and people using social networking data and formed the foundation of Eden's business success. Mikuru possesses advanced technical skills in programming, computer repair, and maintenance. She is strongly protective of her laptop, rarely letting others handle it.
Mikuru is Kazuomi Hirasawa's cousin and a trusted Eden member. Her personality is shy and reserved, especially around strangers, but she becomes open and expressive among close friends like her best friend Saki Morimi. Though she often appears bored or emotionless, unexpected situations easily fluster her.
In *The King of Eden*, Mikuru assists in monitoring Seleção activities through their shared database. She receives and relays Saki Morimi's email confirming Akira Takizawa's location in New York to the Eden group, providing them relief. During *Paradise Lost*, Mikuru participates in a critical operation with another Eden member, Sis, hijacking a truck belonging to the Seleção Daiju Mononobe. This action supports Takizawa's efforts to confront Mononobe and advance his objectives within the game.