Thanks to the unique awakening of her Soul Sense, Nira could smell the souls of the people she came in contact with.
Thus, she had claimed to detect the same scent from Lemaar as the man responsible for the destruction of her apparition back in Anfang.
However, in reality, she felt that something was off. And that her claim was not entirely foolproof.
She could tell that Lemaar's soul had two distinct scents as if his soul had been created by superimposing and fusing the souls of two different beings. As such, she was perplexed about the identity of Lemaar.
If she didn't know any better, Nira would have declared that Lemaar had been demonically possessed or that he was an incarnation of some god who had sent their Divine Sense inside his soul.