Sure! Emphasis on the "general", I'm assuming, so I'll gloss over some detail. Isabelle was born to an aristocratic couple in England consisting of Lord Alec Underwood and his wife, Viola. Isabelle grew up hated by her mother and doted on by her father, but he became increasingly physically abusive and eventually sexually abusive. Their relationship was a very intense, psychologically manipulative one to the point that when Isabelle eventually escapes him, she still looks back on him with more love than anything...at least at first. She does end up realizing how fucked up everything was, but needless to say the environment she spent the better part of two decades in did a real number on her psyche.