Adèle is Jane’s pupil at Thornfield, a little French girl just under ten years old, the daughter of Céline Varens who is an opera dancer who was Rochester’s love sometime ago. When Jane first meets her, Adèle’s only been in England for a few months, and she’s never really been asked to study or apply herself; all she cares about our clothes and getting attention by showing off her singing and dancing skills. It’s not clear whether Adèle is Rochester’s daughter. Why we think yes? Because her mother said so and Rochester had precisely at that time relationships with her. Why not? Because both Jane and Rochester see that Adèle doesn’t look or act like him at all, and also Céline was cheating on Rochester at the time Adèle was conceived.
Adele Varens in the Essays