In episode 12, Kana tells Shinichi that she can tell Migi's emissions apart from the other Parasytes. However, she is shown as being on "cloud nine" for Shinichi - going as far as wrapping his hair around her finger like an engagement ring, and
near the end of the episode, she mistakes another Parasyte for Shinichi in the ruined building, leading to her death.
Since Migi states that her powers are increasing, it could be possible that she would be able to tell the Parasytes apart in the future. However, her death cut that development short.
Was she really able to tell Shinichi apart from the other Parasytes, or was she just delusional? Does the manga reveal anything about this?