[Felix freezes, now meeting Sylvain's gaze again to stare at him. It slowly shifts from a stare to a disbelieving glare; but there's something else in there too. Distress, maybe.]

What? Is that what this is all about? Sylvain, how can you be the smartest person I know and this stupid at the same time? Do you really think I'd have spent my whole life by your side if I didn't want to? Don't you dare accept what your disgusting father has said about you, I won't stand for it. You're my--

[His what? 'Best friend' doesn't seem...adequate.]

--I don't even know anymore, but if you think you can get rid of me, think again. We made a promise and I refuse to break it because you've let your family put these poisonous thoughts in your head. Someone has to remind you how wrong they are, and I don't trust anyone else to do it right.

[He huffs out a sharp breath and then seems to realize how much he's said, glancing aside again as his face reddens and clearing his throat.]

...of course I don't think that, don't be an idiot.