Ysionris Jeromi

Vice Admiral Ysionris Jeromi is a human flag officer of the UNSC Navy and the commanding officer of the. His exploits during the Human-Covenant War as the commanding officer of the Hopeful have made VADM Jeromi a legend throughout the colonies.

Biography
On multiple occasions, Jeromi has taken the, a ship with no weapons or armor to speak of, into battle to save the lives of the critically wounded aboard damaged ships. He has saved tens of thousands of lives, and more than once faced a court-martial. He had gained and lost rank over the years, but he has also won the UNSC's Colonial Cross twice. He was a four-star admiral in 2525, and a three-star vice admiral in 2531.

He was a personal friend to Dr. Catherine Halsey, and analyzed a number of 'hypothetical' experiments on bonobo chimpanzees for Dr. Halsey in 2525. She was his star pupil, and he had never approved of her working with the Office of Naval Intelligence. He was a mentor to her and his disapproval made her decisions more difficult. He sent her UNSC Priority Transmission 09872H-98, detailing his objections to a "hypothetical" augmentation process and the dangers of such a process. The experiments he conducted were later used on the SPARTAN-II soldiers. However, he was not made aware of this and likely would have objected if he had known.

In 2531, he took the SPARTAN-III soldiers aboard the Hopeful for their augmentation procedures. He was suspicious of Lieutenant Commander Kurt Ambrose, especially after a message arrived for the Spartan from a secret Slipspace COM launcher.

List of appearances

 * Halo: The Fall of Reach
 * Halo: Ghosts of Onyx
 * Halo: Reach
 * Dr. Halsey's personal journal
 * Halo: Fall of Reach
 * Boot Camp
 * Halo: The Fall of Reach - The Animated Series