Erren Florent
Ser Erren Florent is the youngest son of Ser Ryam Florent, and through his house's marriage ties to the Baratheons he is kin to King Stannis.
His name surfaces in the War of the Five Kings through a mission gone wrong: sent to gather troops for Stannis's cause, he ends up a captive of the other side.
Chapter 1
The mission to Bitterbridge
Books only
After Renly Baratheon's death, Erren joined the rest of House Florent in swearing loyalty to Stannis, the brother left with a claim to the throne.
Stannis sent him with Ser Parmen Crane to Bitterbridge, tasked with bringing over much of the foot soldiery that had served Renly.
The mission failed: the Tyrells captured both men at Bitterbridge before they could gather those troops.
Chapter 2
A prisoner at Highgarden
Books only
After his capture, Erren was taken to Highgarden as a prisoner of the Tyrells.
He was still held there later in the war, and the sources say nothing more about him beyond that continued captivity.