Angelique Collet begins as an ordinary high school student on the main planet of the Sacred Bird Cosmos. Her life changes upon discovering a mysterious ball of light that transforms into a creature, an event leading to her selection as a candidate for queen of the newly formed Beast Cosmos. During her queen examination in *Angelique Special 2*, she undergoes trials to cultivate this nascent cosmos and succeeds, becoming its first queen.

In the console RPG *Angelique: Heaven's Requiem*, she faces interdimensional threats when the malevolent Emperor attacks the Sacred Bird Cosmos ruled by Angelique Limoges. Collet mobilizes to protect both realms, defending allied territories beyond her own. The OVA *Angelique: Shiroi Tsubasa no Memoir* (White Wing Memoir) continues this conflict, depicting a queens' reunion that escalates into crisis with the return of Arios, a guardian thought deceased, who attempts to assassinate both queens. Collet collaborates with Limoges and their guardians to thwart the threat.

Later, in *Angelique Trois*, forces pull her into a separate pocket cosmos where she liberates its captured queen, extending her responsibilities. Her leadership evolves further in *Angelique Etoile*, where she mentors Ange, the legendary "Etoile" destined to save both cosmoses. Collet tasks Ange with recruiting nine new guardians for the Beast Cosmos, cementing her role as an established queen overseeing cosmic stability.

Her background includes an alternate universe depiction in the board game *Sweet Ange*, where she attends Smallney Academy under the name "Collet" and participates in the Rose Contest culinary competition. This depiction exists outside the primary continuity. Throughout her journey, Collet transitions from a commoner student to a multidimensional sovereign, defined by her dedication to nurturing and defending interconnected realms against existential threats.