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I want to like all of these characters cause admittedly I'm just a huge sucker for these type of dynamics.
Say what you want about Roy looking annoying or you just want to be a proud racist but that doesn't change the fact that we haven't seen him yet in this anime. Obviously it looks like Roy will have the happy go lucky and goofy pure personality but there's nothing really wrong with that?
If he bounces of well with Liko and the others and he makes Liko's character more outgoing, sassy etc. that would be my preferred dynamic for the two and of course he can bounce of Friede and the others too.
Like we can wait for episode 4 (Where he's likely to appear) to see how he meshes with everyone to make our final judgment