Okay he doesn't turn into a bear first off, secondly he most definitely acts like a bear on certain seasonal changes, like Spring and Winter, where in Spring he has energy to spare, while in Winter he has no energy and sleeps most of the time. Third, the only thing he fears is the people around him. I'll go into more detail in the CS about that. And lastly he was calmer than a moonlit pond on a Mid Summer's night when he walked into the academy.