He ought to be more concerned that Harrow - the one who knows these blades best - is so unsure about what they're doing here. Prone as Felix is to gauge himself by others, though, he doesn't mind seeing Harrow hesitate.

"It is only a summoning away." Even if Harrow doesn't summon them like a conjurer's bound weapons. Felix nods thoughtfully, asking offhand while he considers how to phrase that, "Do they have names? I don't know if that's a silly question, but..." If so, it's important to know.