Himiya Sei

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  is the protagonist and the third member of Freiheit PreCure. His alter ego is.

Appearance
Sei has shoulder-length maroon hair tied up in a small ponytail and orange eyes. He is usually seen wearing the girls' school uniform. If not, his winter casual outfit consists of a white shirt, a black hoodie, black pants and red sneakers. His summer casual outfit consists of a white T-shirt, black leggings and black sneakers.

Past life
He was raised as a girl since 12 because he needed to replace his twin sister Seira who was a drummer in a popular girls' band, which all of the band members were missing during their world tour in Hong Kong.

Relationships
Himiya Akane: She is Sei's mother.

Himiya Seira: She is Sei's twin sister, who is also a drummer in ImagiNATiON, a popular girls' band. She is the previous user of the Firedust Perfume.

Cure Skylight
'''"Burning the flame of belief! Cure Firedust!" '''燃える！信念の炎 ！ キュアファイアーダスト！ ''Moeru! Shinnen no Honou! Kyua Faiyādasuto! ''

 is the alter Pretty Cure ego of Sei. He transforms using his Firedust Perfume.

Etymology
Himiya (緋宮) - "Hi" means "scarlet" and "Miya"  means "palace", so "Himiya" can be loosely translated into "scarlet palace".

Sei (征) - It means "conqueror".

- "Firedust" means "the burning dust coming from a burning flame".