Long ago, she was in love with a young bard, but the Judgement Gate caused them to be separated forever.

She also has a human disguise, and used that as she acted like an incoming freshman to the Nekomi Institute of Technology, and joined the Auto Club.

Because Celestine told her it would be advantageous to their plan, Morgan tried her best to get between Keiichi and the amnesia-stricken Belldandy. However, feelings within her began to well up, and due to a number of reasons, she began to fall in love with Keiichi. If Celestine was to have Belldandy, then Morgan may as well have the leftovers.

Morgan's own reason for joining Celestine in changing how the world was built could be attributed to the fact that she is a very lonely person. She had defied her family, her heritage in falling in love with the young bard, and the Judgement Gate's curse had separated her from her lover forever.

Being separated from her lover, nobody else would probably approach her, due to the fact that she is still heartbroken, and that she was a faerie. The social stigma of being near anybody of another race would be enough to cause her loneliness. Also, her attraction to Keiichi may have fuelled her on, as she was reminded of her own failed relationship.

Eventually, at the end of the movie, she realizes that her and her lover were separated because she herself doubted the relationship, and stayed behind at the Judgement Gate to tell others that there was hope to pass through the Gate with the blessing of the gods, if they truly believed and trusted in each other.