The musical themes for the anime adaptation of "Tensei Shita Dai Seijo wa, Seijo de aru koto o Hitakakusu" have been decided. The Opening Theme will be the song "Flare of Soul" by the artist Kana. For the Ending Theme, "STELLAR" by the group Utahime Dream All Stars was selected, a music project that emerged from a media mix.

Additionally, new graphics of the main characters, specially created for the series, have been released. The illustrations, which come from character designer Satomi Kurita, show the characters Fia, Zavilia, Savice, and Cyril.

It was also announced that a web radio program for the series will be produced. The moderation will be handled by Shion Wakayama, the voice actress for the role Fia Loude, and Shino Tokudome, the voice of Zavilia. Further details regarding the start date of the program will be announced at a later time.

The plot of the series revolves around the girl Fia, who, despite the claim that she possesses no talent for the sword, still wants to become a knight. In a near-death situation, she remembers her previous life, in which she was an overwhelmingly powerful "Great Saint". The release of the anime series is planned for April 2026.