I don't like anomalies.

No. Yeri is kind. She remember her past live just like Valia. She was just extremely grateful to Valia. Yeri will protect Valia when Alvan's concubine started revealing to noble that Valia was actually the "sacrifice bride". Yeri will tell people it's wrong, but Shu was actually pissed because he doesn't like Valia called like that, so he will challenge duel to nobleman who called Valia as tribute