Rusenloft, unlike the Strarade, treat their trainers with a certain distance. Becoming more detached emotionally they will often play tricks on trainers and those around them by tricking them into thinking they are friendly or are apologetic for their prior actions.
Additionally, more cruel and with increased power, will often force other weaker pokemon to do dances and other artistic performances that it can then take the leading roll in or be the center of attention.
by Shattered_Disk4