They may only be shapeshifters but we still love 'em....
Sam is the Alpha of the "werewolf" pack. He is engaged to Emily Young, however he was once in love with Leah Clearwater, but this relation soon dissolved after his first transformation, due to that fact that he couldn't tell Leah, and that he Imprinted on Emily while she was visiting her cousin (Leah). Sam's "werewolf" form is a large Black Wolf.
In Breaking Dawn, Sam engages a plan to take out the 'thing' inside Bella, he is well aware that in the process they might possible kill her and that was a price he was willing to pay. Also he arranges for the pack to take down the Cullens. The pack decreases to 7 when Jacob, Seth and Leah brake off into their own pack, Jacob totally disagreeing with Sam, Seth wanting to stay close to Jacob and Leah following her Brother (Seth). They are later joined by Quil and Embry. However by that time, due to the abnormal numbers of vampires in the area, more Quileutte Boys have developed the ancient power. Making the total number of "werewolves" in the area at 16.
Quil is one of Jacobs best friends, he is the only "werewolf" to be happy with his transformation as he is back with his friends and understands what had been happening. Quil has imprinted on Claire, Emily's 2 year old niece, even though Quil is slightly scared by this, he is comforted by Jacob saying that there is nothing wrong with it and he will just have to wait for Claire to grow older.
He shows a stronger bond with the now 3 year old Claire in Breaking Dawn. He later joins Jacobs renegade pack.
Embry is another of Jacobs friend. His mother was not a tribes woman so that means that his father was of the tribe, which could make him related to either Quil, Jacob or Sam.
In Breaking Dawn the questions is never answered.
Leah Clearwater is the only female werewolf (the transformation is supposedly what caused Harry Clearwaters Heart attack). She is not well liked in the pack for her cynical and arrogant views. She uses the packs telepathy to torment them with their deepest thoughts.
In Breaking Dawn, Leah becomes a more likeable character. She frees herself from Sam's pack and couldn't be happier.
Seth is Leah's brother, he was given an important task in the 3rd book to protect Bella, which he did to his best.
In Breaking Dawn he sports an unusual friendship with Edward. He was the first to join Jacob's smaller pack much to Jacobs disapproval.
Not much is said about Jared either except that in the second book during Jacob and Paul's Battle he and Embry made bets on who would win.
He is used as a messenger from Sam to ask Jacobs pack to rejoin the main pack to which the answer is a resounding 'No'.
Nothing much is said about Paul except that when Jacob first introduces Bella to the Pack, his anger got the better of him and he tried to get at Bella but was restrained by Jacob, resulting in a "werewolf" fight. They later shrug of this battle and remain friends. Paul's wolf form is a large silvery wolf.
He later Imprints on Jacobs older sister Racheal.
Collin and Brady
Collin and Brady are the newest members of the pack and during the final battle in the 3rd book they had to remain at La Push to protect it.
The Other Six
No-idea who they are, although they make an appearance at final 'battle.