If ever I can figure out how to post a picture here, I will add one. But, for the moment, here is the basic write-up.
Name: Ser Doyle Lannister
Parents: Lord and Lady Lannister, the Lord of Casterly Rock and his wife (left unnamed in case of players)
Birthplace: The Rock
Location: The Rock
Background: The second son of the head of the family, Doyle stayed for several years at the castle of one of the Lannister bannermen, a much-respected knight and lord for whom Doyle squired. He was knighted after leading a small force after some bandits and putting them down.
Lannister fortunes are on the rise, and Doyle is looking to marry well, preferably to the daughter of a lord without a son. Or, it could be that something will happen to his older brother along the way.. while Doyle likes his elder brother in a sort of general way, he would very much like to be the heir to Casterly Rock. At this point, Doyle is not a black enough soul for fratricide, but who knows where the story might take him?
At the moment, though, his father has many concerns that take up his time, and with Doyle being as bright as he is, his Lord Father is beginning to delegate minor tasks to him, and seeing how well Doyle does. Doyle knows that he is being tested, and indeed he's looking forward to proving his mettle. If he does well, he may be sent to King's Landing, to look out for the family interests there, which are presently being handled by his father's paternal uncle, a man in his sixties who will not remain in that position forever.