Movie
Description
Frey is a significant supporting character in That Time I Got Reincarnated as a Slime the Movie: Tears of the Azure Sea, serving as the sovereign queen of the Harpy race. She is a striking figure, possessing large wings on her back and talons in place of feet, though she has the ability to conceal her talons to appear with human-like legs. She has long white hair, a red gemstone on her forehead, and a tall, buxom physique, typically dressed in an off-the-shoulder red leotard with a plunging neckline.

In the events of the film, Frey is depicted as a cunning and strategic individual. While she holds the title of a Demon Lord, she lacks arrogance and possesses a humble self-awareness, often acknowledging the limits of her own power compared to true elites like Milim Nava. She is cautious in her dealings and deeply values loyalty, acting as a guiding mentor figure. Despite her regal status, she is not prone to needless cruelty, though she reacts sharply to insults and disrespect.

Frey's personal history is complex. Approximately five hundred years prior to the film's timeline, she ascended to the throne of the Harpy Kingdom by defeating her predecessor, who was her own mother, in accordance with her people's laws. Unbeknownst to her for a long time, she had an older twin sister named Nazim, who was banished at birth for being deemed unworthy. As a queen, Frey is highly protective of her domain's airspace and has a specific obsession with conquering high-altitude locations to expand her dominion.

Within the narrative of Tears of the Azure Sea, Frey plays a pivotal role in the political machinations surrounding the Demon Lords. She is initially seen cooperating with the Demon Lord Clayman in a scheme to manipulate Milim Nava using a cursed necklace. However, this collaboration is a calculated deception; Frey is not truly loyal to Clayman but is instead playing a long game to protect herself and eventually undermine him. She harbors a genuine and deep friendship with Milim, often acting as a maternal figure who ensures Milim takes responsibility for ruling her domain. This loyalty ultimately leads her to betray Clayman in favor of her alliance with Milim.

In terms of development, Frey undergoes a significant shift from a sovereign ruler pursuing her own ambition to a voluntary subordinate. Accepting that she cannot match the power of the strongest beings, she willingly resigns her position among the Ten Great Demon Lords to become Milim Nava's loyal retainer and caretaker. This decision showcases her pragmatic nature and her ability to adapt to new power structures for the sake of survival and stability.

As a winged ruler, Frey’s notable abilities are centered on aerial combat and magical prowess. She is an extremely powerful fighter with masterful control over flight and the skies, which she protects zealously. Later in the broader series, following significant battles, she evolves into a higher existence known as the Spirit of the Sky, or Sky Spirit Bird, transforming into an Awakened Demon Lord of significant power.