He is called "The god's chosen emperor", and " The German prodigy". Kaiser is egotistical, arrogant, playful, and sly. sometimes he may flirt indirectly or directly, it's often just to get in one's nerves and to provoke them so their gameplay won't be as good. Though when people actually fight back he'll be suprised and would seek vengeance, his interest in you would be at it's peak, and he might even stay silent if you really affected him.