This doesn't have much to do with Agravaine, but hey. It's the only one that somewhat connects. It makes the assumption that Tristan got knighted - but if he doesn't, I think it could work that way too.
Hatred
Tristan didn't hate Morgana. Being an ally of Arthur's, he would fight her. He simply held no anger towards Morgana, and didn't really understand why others did.
Then he heard Elyan gasping and muttering in his sleep during patrol, "I can tell you! They're in Ealdor, please!" He saw the panicked look in Gwaine's eyes and clenched fists in training and the way Arthur's face closed up when he passed her old rooms. He saw the people Leon always stopped to talk to and knew they'd lost loved ones as "examples" during Morgana's first reign.
Slowly, he began to understand.
