Faith is Roronoa Zoro's daughter only he doesn't know about her. She's 2 years old and her mother had been killed in front of her 3 days ago. Zoro had slept with Eileen the last time they made port here.. that was 2 years and 9 months ago. Zoro came to check on her since he hadn't heard from her. He finds the body first then a 2 year old girl hiding who looks like him but with her mother's violet eyes. He knows she's his after seeing her.