It's hard to write about RP since I suck at it and am quite inconsistent, so I'll just talk about history.
Agrahem grew up on the plains of Mulgore, he began his training at a very young age and was very close to his father. He had a mate for a few years who he loved above all else, however as he came of age to leave his family and seek training elswere in the world tragedy struck. While out on a walk with his mate they were ambushed by a raiding party of centaurs. He defended his mate as best he could but eventually she was slain, he himself would have fallen had a group of hunters not saved his life. He was never the same after that. He trained relentlessly day and night until, finally, he assaulted the centaurs camp.
He fought like a madman and slaughtered them all, even the younglings. He then went off into the mountains to contemplate his actions for weeks. When he finally returned to his family he was greeted by a scene similar to that which he had caused in the centaur camp, a centaur had escaped and fled to Mauradon to tell of Agrahems actions. The centaurs had attacked swiftly one night and left no survivors.
As a result of this Agrahem is generally violent and highly protective of people he cares about. He cares little for his own safety and will happily fight overwhelming odds, he lives his life by the proverb "go into battle expecting to die, and you shall live forever" and belives that Should he fall then he will be reunited with his family in the afterlife.
P.S Since completing Mauradon I decided that that was enough to consider Agrahems revenge complete.
P.P.S The reason this is so long is because I was really bored