what happened after rue became a leshah in novel? can y'all kind hearted ppl explain

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Lmk too

It will be shown in the following chapter but in short. Na-in feels betrayal and grief.
He will treat Rue coldly and pushes him away. He is just scared he will lose Rue now that he became a Lesha and he can be sacrificed as well, if that happens Na-in wont be able to stop it