Solemn Penance

Regret's Carrier is an Assault Carrier that was used by the Covenant in several battles. It was commanded by the High Prophet of Regret.

First Battle of Earth
The High Prophet of Regret used the carrier as his flagship for his search for other Halos. He eventually came out of slipspace over Earth and engaged with the UNSC Home Fleet. The Carrier was able to break through the Cairo Station battle cluster and landed in Africa

First Battle of Mombasa
The Carrier stopped above the city of New Mombasa and Prophet of Regret sent forces, including a Scarab down to the surface. Spartan-117, along with other UNSC forces slowly fought their way towards the Carrier in order to capture Prophet of Regret. As soon as the Scarab was destroyed, The UNSC In Amber Clad started moving towards the Carrier. Prophet of Regret ordered for a slipspace jump. The Carrier eventually jumped with UNSC In Amber Clad following. The slipspace jump resulted in the destruction of New Mombasa and Old Mombasa.

Battle of Installation 05
The Carrier jumped to Installation 05 where it landed. The Prophet of Regret got offboard and went to a Forerunner Temple on a nearby lake. Eventually Spartan-117 was able to kill the Prophet of Regret, just as High Charity came out of slipsace above Installation 05. It is unknown what happened to Regret's Carrier after he was killed, although it can be seen intact on the Halo 2 level The Great Journey.

Trivia

 * The ship can be seen the the levels:Metroplois,Delta Halo,Regret,and The Great Journey.