Kikuoka Seijirou

Kikuoka Seijurou (菊岡誠二郎) is a member of the Ministry of Internal Affairs and Communications, Technology, Second Separated Advanced Network Division, or «Virtual Division». He uses the handle Chrysheight (クリスハイト) in «ALfheim Online».

Background
He was an investigator in the «SAO Case Victims Rescue Force», and the one who told Kirito which hospital Asuna was in. Though he is stated to be part of the virtual division, Kirito suspects he is part of the JSDF, after tailing him.

His skill as a mage in ALO is acknowledged by General Eugene.

Gun Gale Online
Kikuoka Seijirou makes his first appearance in Volume 5 as an aquaintance of Kirito, contacting Kirito for advice concerning a troubling matter. He introduces the Death Gun problem, trying to debate on how Death Gun can kill through the tamper-proof safety conscious AmuSphere. He and Kirito reason that such a feat is impossible, but he convinces Kirito to investigate for a sizable fee.

After Kirito enters the «Bullet of Bullets», Asuna tracks down Kikuoka's avatar in ALO and interrogates him to find out Kirito's true purpose for converting to GGO. He after extreme pressuring reveals everything.

In the resolution, he meets with Kirito and Asada for a debriefing of the incident and apologizes for the danger. Kirito also makes the suggestion of the dangers that some aspects of VRMMO pose, such as invisibility being a gateway to misbehavior.

Alicization Running
In Alicization Running, it is revealed that he is a Lieutenant Colonel from the Goverment's Self-Defence Force, and is in charge of the Alicization Project.

It's also revealed that he took advantage of the «GGO Incident» to form a relationship with Kirito. His true goal was to enlist Kirito to the Goverment's Self-Defence Force.