No, you are jumping to an other than direct meaning of Kiyomi's exact wording. The direct reading says Kiyomi is disappointed with Otto because Otto made a mistake. Anything else is an alternate meaning. In any textual interpretation, regardless of language or era, the direct meaning has the greatest weight, while alternate meanings are listed as possible, until extensive evidence is presented that overwhelmingly supports a specific alternate meaning over the direct one, the direct one is always the primary reading. A direct reading NEVER makes up stuff, because it is the exact verbiage that the author used.Dude, you provided a quote (I assume it's a quote) that proves my point and came to the opposite conclusion... English is not my native language, but I know that 'you' can mean both an individual ('Bob, you made a mistake') and a group ('You guys made a mistake'). Regardless, she's just pointing out a mistake - 'It's not enough to hide one's appearance. A very keen eye might recognize even the subtle movements that are unique and specific to an individual.' As in I see who's behind the mask because of how that person moves (and I recognize those movements).
So yes, you (the person) are making stuff up.