Maga Selent presided as the arbiter for the final Platinum Princess test, initially shrouded as a mysterious cloaked figure. She monitored the candidates and relayed information to Queen Ercell regarding their protection. Her true identity emerged as the former Platinum Princess candidate from the Magic World, a realm destroyed over a millennium prior by the corruption that birthed Diabolos. As princess of that lost world, she had rejected the Eternal Tiara to save her friends, an act that inadvertently caused her world's annihilation and the disappearance of all she cherished. Punished for this refusal, she endured a curse: to live until the next Platinum Princess was chosen, forced to witness the cycle repeat.

Centuries of profound guilt and self-blame over her world's loss and her friends' perceived pointless demise hardened Maga Selent, shaping her stern, cold arbiter persona. During the final test, she altered the candidates' attire to match her tattered cloak and unveiled the Eternal Tiara's hidden condition: only one candidate could be chosen, the others vanishing. She urged the candidates to accept this sacrifice as inevitable.

Her perspective transformed when the current Platinum Princess candidate, Yucie, rejected the Tiara to protect her friends, echoing Maga Selent's ancient choice. Yucie later confronted Maga Selent in the Magic World's ruins, refusing to sacrifice her companions. This confrontation intensified as Yucie discovered a drawing by Cocoloo that restored her memories, demonstrating friendship's power. Yucie conveyed a pivotal truth: the spirits of Maga Selent's lost friends and people had always loved her, never blamed her, and remained spiritually with her throughout her isolation.

This revelation finally allowed Maga Selent to grieve and recognize she was never truly alone. Yucie's actions sparked a resurgence of magic in the desolate realm, manifesting Sunset Blossoms and a yellow Crystal Flower embodying the Magic World's attribute of love. Maga Selent took this fragment and united it with the Eternal Tiara. Joining Yucie as a fellow Platinum Princess, they combined their power to grant Yucie's wish, saving Prince Arrow and fulfilling Maga Selent's original purpose. With her curse broken and redemption achieved, she vanished peacefully alongside the collapsing Magic World ruins, finally reunited with her people in spirit.