Jonathan Ishii

"The devil is real. I know, I built his cage."

- Jonathan Ishii's last words before the invasion begins

Dr. Jonathan Ishii is a minor character in Doom 3.

Background
Dr. Johnathan Ishii is one of the scientists from Delta Labs, working under Dr. Malcolm Betruger. He and the other scientists helped to create a new portal to another dimension. It turns out one of the dimensions they opened the portal to is Hell, much to Ishii's shock and horror. Despite this, Ishii notices Betruger urging to continue the teleportation experiments to open the portal to Hell.

Fearing the inevitable doom that is to follow, Ishii goes AWOL in order to send a communication signal to warn Earth about the situation.

Doom 3
Upon arriving to Mars, the Marine finds an email in regards to a missing staff, which happens to be Ishii himself. Following the reports that Ishii was spotted heading in the old communication facility, Sergeant Thomas Kelly then assigns the Marine this assignment to locate Ishii there and bring him back unharmed.

Once the Marine successfully locates Ishii, the scientist panics, desperately begging the player to let him send a transmission to Earth to warn them of Dr. Betruger's experiments. Suddenly, the main portal in Delta Labs activates and demonic spirits come pouring out. Forced to partly bear the responsibility for the horror he has caused, Ishii watches helplessly as the demonic forces start attacking and quickly possessing majority of the human residents on Mars. Ishii then shortly suffers from the same fate, as he suddenly turns into a Zombie, forcing the player to kill him.

Email - Code-Black: Missing Staff (11-15-2145)
This email can be downloaded directly from an information terminal in Mars City.

Note: The email cannot be downloaded after returning from the old communications facility.

''Dr. Jonathan Ishii from the Delta Science Team is missing. Security is concerned that he may be injured and unable to respond to pages or return to his post. Please keep an eye out for Dr. Ishii and report to UAC Security if he is located.''

He was last seen in Mars City Underground approaching the airlock leading to the old communications array.

Transmission Input
CODE STATUS: 1131 - TOP PRIORITY URGENT

FROM: J. ISHII - ACCESS CLEARANCE DB1

EMERGENCY REPORT ON CURRENT RESEARCH

''I have calculated the effects of a containment failure and they exceed our prior estimate. No biological entity in the blast radius is likely to survive, yet Betruger is pushing stabilization fields far beyond system limita''

Trivia

 * It's possible to kill Ishii before he is possessed.
 * Ishii is the first enemy and the first casualty the player encounters.
 * Shortly before Ishii becomes possessed, the player can still speak to him. However, he is not going to respond, perhaps remaining speechless with guilt for the horror he has partly caused.
 * According to the Making of Doom III book, the original story called for Ishii to commit suicide by shooting himself in the head.
 * You can read the transmission Ishii is trying to send on the screen in front of him. Trying to send the message will result in an error and short video of a pistol wielding Z-Sec killing a Marine.
 * Ishii is referenced in Doom Eternal The Ancient Gods - Part One in the Blood Swamps, there is a castle found in the level named Ishii's Keep.