Princess Lexa is the heiress to the Oathbound Kingdom within the Oathbound Dimension, from which she and her younger twin-brother Orin originate from. As the eldest child, she is the heir apparent to her father and to succeed him as the monarch of the Oathbound Kingdom.

Lexa makes a small cameo in the Epilogue of Futuristic Twilight, voiced by Sarah Miller-Crews. She is set to reprise the character in the upcoming film The Son, which canonically takes place after the events of Futuristic Twilight, and is the start of the Nexus-verse project.