Rumm

Mr. Rumm is a fictional character in the StarCraft universe. His first name is unknown.

Lt. Rumm was a Terran Confederacy military officer charged with the task of training Terran Ghosts. His methods involved using cybertechnology (contained in a neuro-adjuster) to alter the memories and weaken the psionic abilities of uncooperative Ghosts. The Ghost would then become loyal to the Terran Confederacy.

Training Kerrigan
Rumm implanted the cybertechnology into Sarah Kerrigan. He also used Ghost conditioning on her, permanently weakening her psionic abilities unless she discovered the secrets behind the conditioning. Even removing the implants would not completely restore her abilities. With the implants in place, Kerrigan became a loyal Confederate soldier.

Showdown with the Sons of Korhal
Kerrigan was released from her training and eventually was freed by the leader of the Sons of Korhal, Arcturus Mengsk.

Mengsk freed her from the cybertechnology, restoring her memories and psychic abilities.

Mengsk wanted her to attack the Terran Ghost Academy on the Terran Confederacy homeworld, Tarsonis, a difficult task for such a small terrorist organization as the Sons of Korhal. In addition to the psychological victory this would inflict on the Confederacy, he also wanted her to retrieve a Ghost for reasons he kept to himself (even though she could read his mind).

In order to locate this Ghost, she needed to get a locator from the Academy's commanding officer ... Major Rumm himself. Kerrigan had been in the academy before.

As she infiltrated the structure, she overhead a conversation with some soldiers indicating that xenomorphs were in the facility, being kept secret from most of the people there.

She made it to Rumm's quarters, only to find a note saying he was in the training area.

Rumm had received a warning from a traitor warning him of an attack by a renegade Ghost, so he left the note there to lure Kerrigan into an ambush. It worked. Kerrigan detected his thoughts too late and fell into a high-gravity chamber. Her cloaking device exhausted itself, revealing who she was to Major Rumm.

However, she did not remain trapped for long. The attack destroyed the installation's power core, deactiving the high gravity chamber. Rumm fled to a lift. Kerrigan escaped, only to run into a Ghost loyal to Rumm. Defeating him in hand-to-hand combat, she used his weapon to lock down the lift.

Then she approached close enough to use her psionic power on him. While it had been weakened, it was still effective. Rumm was killed by the very ability he had tried to control and suppress.

Appearances
Rumm does not appear in the game, and is only seen in fiction published by Blizzard Entertainment, namely StarCraft: Uprising and StarCraft: Hybrid.