Amber

Amber is the fiance/wife of Pickles' brother Seth. She marries Seth in "Dethwedding", making her Pickles' sister-in-law. She is also the mother of Seth's child. Like the rest of Pickles' family, her last name is unknown as of Doomstar Requiem.

She is seen meeting Dethklok, and marrying Seth, and then seen to have joined her husband in Australia where she presumably gave birth. She is not seen again until Season 4, episode Motherklok where  she is featured with a much older son.

Personality
Very little. She has never said a word on-screen, and rarely looks up from her phone, where she is presumed to be texting. Seth Describes her as "Lil' Amber, lil' love of my fuckin' heart" before telling her to turn around.