The 15+ Best Grown-Up Anime on Hulu

Elfen Lied is so unsettling that if you find a child watching it, you should probably set them up with a therapist who can help them process what they've just witnessed. Lucy is a Diclonius, which is a special breed of human that possesses incredible powers, but is also targeted for experimentation. She doesn't remember what she's been through at first, but once she does, she isn't going to take it lying down.