Because he might be spicy, duh.

[ don't you know what it means to say a cat is spicy, cassian? no, of course he doesn't, except why would she explain it right now? ]

But Percy has a point about predestination. [ far be it from them to give the cat a prophetic name. they've had enough prophecies. ]

Fine. [ she rolls her eyes. can't believe all these rejections. ] No mysteries, no sizes - we can go with Jim Bob. Maybe Joe Bob. Nothing to live up to there except his own fate.