Elsie is a selkie who went to Camp Underpaw with Matthew. She has dark brown skin, a snubby nose, and coppery brown curls in her hair. She has a pet bunyip named Uluru, given to her by her mom to "protect" her. She enjoys wrestling kelpies. When the mermaids went on strike, she helped to feed the kraken, Silerina (The Kelpie), and the zaratan. Matthew has a major crush on her, but most selkies don't care for humans. Although she may date Mattew, she has not shown any liking yet except for as a friend.