High Prophet of Mercy
From Halopedia, the Halo wiki
The High Prophet of Mercy is one of three High Prophets that lead the Covenant High Council. He is by far the oldest, elected before the Prophet of Truth and Prophet of Regret were ever born. His true name has been revealed as Hod Rumnt.
Very little is known about Mercy, as his role in the game is slim compared to his counterparts Truth and Regret. Due to his appearance and voice, it is thought that he is the eldest of the three High Prophets, mainly because of his ghostly white skin and raspier voice. During a meeting with the Arbiter and the Prophet of Truth he tells a bit of history about the Covenant, mentioning the Grunt Rebellion and the Taming of the Hunters.
He stayed by Truth's side after the death of Regret, and appeared to be more of a supporter of Truth than an equal. As the Civil War of the Covenant began, Mercy still stayed at Truth's side, even as it seemed that Truth was unraveling the foundations of the Covenant.
He and the High Prophet of Truth were attacked by the Flood on High Charity as they prepared to depart for Installation 05 to begin the Great Journey. A single Infection Form made it past the Honor Guard Brutes and latched onto Mercy's neck. Over Tartarus's attempt to save him, Truth let Mercy die, saying, "The Great Journey waits for no one, brother. Not even you."
Before his death, he was found by the Master Chief and questioned where Truth was going. He answered, "Earth, to finish what we started. And this time, none of you will be left behind." With that, the Chief killed the Infection Form, and Mercy died.
Trivia
In Sacred Icon, Mercy says, "Halo! Its divine wind will rush through the stars, propelling all who are worthy along the path to salvation." The Japanese word "kamikaze," commonly used to mean a suicide attack, is literally translated as "divine wind".
