It seems that Kat hated Coop from the first moment they met. But Kat had just been on the receiving end of a baseball. Not just any baseball. A baseball thrown によって Millie... I'm pretty sure that あなた would have hissed at the first thing あなた saw if あなた were in his position!

Coop then attacks Kat with a wave of insults, not the best way to make a friend... Millie does the polar opposite; she welcomes Kat with open arms and insists that they keep him.

How would あなた feel if あなた just landed in a foreign country または an alien world and the first creature あなた meet hates あなた and wants to be rid of あなた and...