Jacob, the one that is in love with Bella but can't have her...
In my opinion Jacob annoys me with his cockyness. But also makes me laugh when he is cheering up Bella. He is a out going , fun, kinda guy..... other then the fact that he is a giant dog, thats purpose in life is to kill vampires...
Jacob is in love with Bella and is fighting very hard to get her to love him just as much... But finding out about Bella getting turned into a vampire and may be marrying Edward made him pretty depressed. Jacob is trying to put a dent into Bella's decision.
Sam is the leader of the wolf pack. Jacob thought that he was up to no good before he found out exactly what was going on.
A young werewolf, one of Jacob's best friends in "New Moon" and still is, he was the last one out of Jacob's pals to change.