In Boku wa Tomodachi ga Sukunai, Kobato (Kodaka's sister) appears to have Heterochromia iridum.

Her right eye is red and her left eye is blue.

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But in episode 5 of the first season, both her eyes are blue.

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What gives?

Is she wearing contacts? I wasn't able to find an explanation for this from the Anime.

2 Answers 2


It is not heterochromia. The manga does explain it better and ...

  • her normal eye color is blue.
  • she is wearing a contact lens.

There is also a mention of her mother being English and having red eye color. So wearing a contact might be a fashion statement.


Her eye is not those kind of special eye or Heterochromia type , she is wearing eye contact to match with the anime character she's cosplaying

  • Is it a specific anime character or is she just trying to look cool/different/unique?
    – atlantiza
    Apr 1, 2013 at 3:33

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