"He has one of the purest, sincerest, kindest minds I've ever heard. You're lucky to share his thoughts."
―Edward Cullen on Seth to Jacob[src]

Seth Clearwater is a member of Jacob Black's renegade shape-shifter pack and was first introduced in New moon as Leah's younger brother and one of the youngest members of Sam Uley's wolf pack before joining Jacob's in Breaking Dawn. After Jacob and his own sister Leah Clearwater, he is the most developed werewolf in the Twilight Saga. He is the son of Harry and Sue Clearwater, and is also the second cousin of Emily Young.