Effy Stonem is a fictional character from the British television series Skins. She is portrayed by actress Kaya Scodelario and is known for her complex personality and emotional depth. Effy is introduced as the younger sister of Tony Stonem, a central character in the first two seasons, and later becomes the main focus in the third and fourth seasons. Effy is characterized by her rebellious nature, introspective demeanor, and struggles with mental health issues. Throughout the series, she navigates relationships, friendships, and the challenges of adolescence, making her a relatable figure for many viewers. Her journey reflects themes of identity and self-discovery.