|Affiliation||Tachibana General Laboratories|
|NAVI||Yonera Touko's NAVI|
|Location||Tachibana General Laboratories, Touko's Apartment|
Yonera Touko (米良柊子, also romanized as Yonera Tohko), is a 27-year-old psychiatrist employed by Tachibana General Laboratories' psychology department.. In the Serial Experiments Lain PSX game, she is Iwakura Lain's psychiatrist, and the lover of Takeshi and, later, Yoshida. She is driven to suicide by Lain shortly before Lain's suicide and assimilation into the Wired. Her boss is Professor Takashima and she hates him because he dumps chores onto her.