FusionDex

Clefkey's ears are sensitive enough to sense people's mood, listening for changes in heart rate and breathing. Attempts to train them to help sufferers of anxiety backfired as they frequently attacked the perceived cause of the sufferer's worries.

When it starts shaking and its nasal breathing turns rough, it's a sure sign of anger. A Clefkey uses its wings to skip lightly as if it were flying.