Seirei Gensouki: Spirit Chronicles - Season 1 - Eps 11: Silver Bride
Rio is shocked when he learns of Celia's marriage of convenience to Charles Arbor. The wedding is closing in quickly. It's to be held the next day. Rio uses Aishia's powers to sneak into the palace guest house to reunite with Celia. The sight of Rio's face makes Celia overflow with joy, but when she's asked if the wedding is something she truly wants, she replies by saying it's something she's agreed to. From beginning to end, Celia's smiling demeanor never falters. Rio is unable to discern her true feelings. The next day, a magnificent parade begins, heading toward the great temple where the wedding will be held.
About Seirei Gensouki: Spirit Chronicles

Title: Seirei Gensouki: Spirit Chronicles
First Air Date: 2021-07-06
Last Air Date: 2024-12-24
Status: Ended
Rating: 8.3/10 (from 215 votes)
Language: JA
Seasons: 3
Total Episodes: 24
Network: TV Tokyo
Genres: Animation, Drama, Action & Adventure, Sci-Fi & Fantasy
Production Companies: TMS Entertainment, Kanon, TV Tokyo Medianet, Nippon Columbia, THE KLOCKWORX, Asmik Ace, Hobby Japan, BS Fuji, Strawberry Meets Pictures, Japan Narration Actor Institute, Melonbooks, CTW, Crunchyroll
Synopsis
His past life and current life are intersecting--a boy with memories of two lives faces his destiny! After his mother was killed at an early age, the orphaned Rio fought his hardest to survive in the slums. One day, he awakens to the memories of Haruto Amakwa, who died in an accident while dreaming of being reunited with his childhood friend, and Rio realizing he has reincarnated in a world of swords and sorcery.
Cast

Yoshitsugu Matsuoka
Rio (voice)

Ayaka Suwa
Rio (young) (voice)

Akane Fujita
Celia Claire (voice)

Yuuki Kuwahara
Aishia (voice)