Every night, Torgi the cat puts me to bed by chirping and nudging me until I stop doing whatever I am doing. Every morning, he head-butts me into consciousness because it is time for his breakfast.
Zen, in contrast, cannot be bothered. Her whims are her own, not to be shared with silly humans.
Right now Torgi is purring loudly while attempting to wedge himself in between me and my iPhone. He is winning.