|August 6, 2091|
|Psychological Therapist (former) |
ES Student (former)
|0113 Invitation from the Abyss|
|Kosuke Toriumi (鳥海 浩輔)|
|J. Michael Tatum|
Riku Mukojima is one of the children who died in a plane accident and one of the seven personalities of Kirito Kamui as a group. He appears, as an older version of himself, as Nobuchika Ginoza's therapist.
Mukojima has short black hair, which curves at the end, and black eyes.
Mukojima seems to be calm and gentle, and gives advice that is hard to follow.
In 2099, during a school trip on an airplane, the plane suddenly develops problems with its airframe which leads to its crashing into Mount Kumataka. Because of the accident, 205 people die ‒ including Mukojima. The current "Mukojima" is just a hologram, developed by Kirito Kamui.
Mukojima is the former therapist of Ginoza. After his demotion, Ginoza still goes to see him, to release his grief of witnessing Aoyanagi's death.