Headstrong

Doesn't listen to anyone, particularly his friends. Smug, arrogant. Puts up a stubborn front to hide deep-rooted insecurities. More vulnerable to psychological rather than physical attacks. In rhinoceros mode, his horn can puncture 3-foot thick steel, release corrosive acid. Uses plasma-sphere shooter that emits explosive energy balls; has light distorting diffraction sword.

(Source: Wikipedia)