Palpatine calling out Roger's fear directly amplifies it tenfold, the contempt laced into the word 'droid', at which his mandibles flitter, even more so. His stingers, his lower pair of arms, can almost be seen shivering.

"Fear? Wh-why would I be afraid of you? You're just some old human politician guy. It's not like you're a Jedi or a-" the word Sith stays stuck in his vocabulator, which a second later he decides for the best. "-clone."