Yarblis Geshkerroth

"I did it for you."

- Yarblis Geshkerroth, on why he did what he did.

Yarblis Geshkerroth was the primary antagonist of the Star Trek novel Ghost Walker.

A member of a primitive species called the Midgwin, Yarblis was a powerful telepath. He was attacked by Klingon scouts who visited his homeworld Elcidar Beta III. Yarblis and his allies used their telepathic abilities to retaliate against the Klingons.

The Federation later left a small survey team on the planet to gather information on the Midgwin. When the USS Enterprise brought additional personnel for the survey team, Yarblis saw an opportunity to rid the Midgwin of all alien influences.

Taking control of Captain James T. Kirk's body, he forced Kirk's consciousness from his own body. Disguised as Captain Kirk, Yarblis took command of the Enterprise. While in control of Kirk's body Yarblis raped Kirk's friend Helen Gordon, and tried to eliminate the last vestigates of Kirk's consciousness. Realizing that Spock was becoming suspicious, Yarblis lured Spock to the hanger deck and tried to kill him there.

Spock was saved when Kirk was able to warn McCoy, Gordon, Uhura, and Chapel that Yarblis had tried to kill him. Hiding in a secret compartment for the next week, Spock created an artificial intelligence program to sustain Kirk.

Yarblis turned the Enterprise back to Elcidar Beta III. Once the ship arrived Yarblis tried to destroy his home village with the ship's phasers. Kirk had left the computer to confront Yarblis, distracting Yarblish long enough for Spock to adjust the targeting computer so that when Yarblis fired the phasers all they did was blast a hole in the middle of an uninhabited desert.

After firing the phasers, Yarblis left Kirk's body and returned to his own body. By then Gordon had filled in the Midgwin leader Kailin Arxoras about what Yarblis had done. Horrified over the selfish and murderous disregard Yarblish had shown, Arxoras casted Yarblis out of the shared consciousness web. Using his prior experience, Arxoras then helped Captain Kirk return to his body, advising the Enterprise crew on how to help Kirk after his ordeal.

Gordon decided to remain with the survey team. A short time later Yarblis came to her, seeking forgiveness for violating and then trying to poison Gordon. Gordon forgave Yarblis. Afterwards Yarblis committed suicide by drowning himself in a nearby river.