Not technically a noble herself, Haydée nonetheless spends quite a bit of time at the palace with her uncles Onésime and Kilian as she has become close friends with Princess Nolwenn. Despite not being blood-related, she is sometimes mistaken as a sister of the princess. Haydée does not see her real sister very often anymore, as Joceline and her husband Tristan like to travel.
Haydée may or may not have a crush on Dorian Guérin. She is learning falconry from the princess and has fallen in love with a kestral in the royal mews named Nicodème, pictured below.