I'm pretty sure he had already knew it be he lost all his memories.
Man, I really wanted to see Tasara's expression.
It didn't really affect him because of his hatred towards Nara. Let's see what will happen in the next chapters.
I believe the end of ch 30 he discovers he’s Nara and more is discovered about what happened is continued on ch 31.
Oh, thanks!
When does Tasara find out that Nara lost his voice because he took the poison for him?