Claire is Mirabelle's daughter. Since her father died in The Unda before she was born, she's never had a strong father figure in her life. As the player gets to know Mirabelle, Claire becomes more and more attached to Cyrus, but ultimately fears that she'll lose him, knowing that her late father was a Muse and Cyrus is one as well. Resolving this conflict is the final stage of romancing Mirabelle, as it ultimately results in putting both of their minds at ease.