Well, some people have very different ideas of what a challenge is~ [It's also not really something Ren can easily quantify, though, which is probably given away by the lengthy hum of consideration he gives out as he muses on it.]

...Though, you know, I don't know that I take the idea of earning loyalty quite that literally now that I think about it... [This is harder than he expected it to be, because token gestures and mild amusements are really the kind of thing he's much more used to considering when it comes to an offer like this. Something that he'd actually stake something he holds in such high regard as loyalty on is a tall order, though he's reluctant to give that away considering how much he's already revealed this conversation.] I don't like deciding things in advance, either, which I guess is kind of the problem.

[He prefers to decide whether he's going to follow someone's lead in the heat of the moment, not because he decided to. Unless it's someone who did something truly meaningful for him.]