Lod Mron (Earth-2042)

"Every member of the Covenant shall walk the path. None will be left behind when our Great Journey begins. That is the San'Shyuum's age-old promise, and it shall be fulfilled!"

- High Prophet of Regret

The High Prophet of Regret, born Lod Mron, was the youngest of the three San'Shyuum High Prophets who led the Covenant High Council prior to and during the Clone Wars. Rash, ambitious, immature, and naive compared to the other Hierarchs, Regret originally served as Vice Minister of Tranquility, where he worked frequently with Sangheili and had adopted some of their personal traits, such as a preoccupation with honor and personal arms. In many ways, he could be characterised as a San'Shyuum who thought like a Sangheili; a rare mindset for his species, and from the High Prophet of Truth's point of view, a dangerous one. Regret was intelligent and fiercely opposed the Galactic Republic and Humans through the course of the war. He expected his soldiers to obey him without question. After pledging the loyalty of the Covenant to the Confederacy of Independent Systems, Regret and his fellow Hierarchs were made members of the Separatist Council.

Source

 * https://www.halopedia.org/Prophet_of_Mercy