Hrmm... No, actually. It just means Ratatosk has a limited number of exceptions. And I mean EXTREMELY limited. Because he's hostile to a lot of Emil's friends at the drop of a hat. So, he chalks it up to, as he told Lloyd, that they prefer someone who is weak and spineless, and therefore really aren't worth his time. Because Ratatosk responds strongly to strength.

For instance, he seriously almost mauled Obi and Shirayuki, but Rose stopped him. And now he's... aware he can't just maul people randomly. At least for a few days, anyway. So that's another thing contributing to him reigning himself in.

What would Lloyd do if he saw Ratatosk about to attack some poor soul? :'D