Sentence 1: My sister-in-law has a cat named Oliver. 
 Sentence 3: He doesn't like anyone when he first meets them 
 Sentence 4:  After a while he warms up to most people 
 Sentence 5:  He is a nice cat when you get to know him 
 Option 1: Oliver is a very ornery cat. 
 Option 2: Oliver is a very friendly cat.