The Lost Saintess~

There's a legend Fódlan in about the lost saintess who sacrificed herself for Seiros. But there's a secret, Y/N was Serios's little sister. Seiros tried to persuade her sister not to use a soul-sealing spell because of the consequences but Y/N knew that there would never be peace in Fódlan if she didn't do it. Seiros and the other four saints mourned their dear friend and sister's death but before she perished she told them she'd return when peace was restored to Fódlan. Throughout the generations, they have been told about the lost saintess. Her portrait hangs at the entrance of Garreg Mach Monastery.
Present Time
Y/N is running away from her now-current ex-boyfriend after she found out he was cheating on her with her best friend. She can hear them calling out to her in the distance in agony, afraid she will get lost or killed in the forest. Y/N saw a big bright light and ran straight to it. When she got to it she saw a big banquet going on and a woman that looked like she was hanging above the altar. A tall woman with green hair then spoke,

???: Today is Saint Y/N day and also the day of her death. She sacrificed so much for us all to have peace in Fódlan and now we pray for her return as she promised us so long ago.

Y/N reached out and touched the light. It sucked her in and she blacked out.