Kenny's an American exchange student who's fluent in English—which, yeah, makes sense. The thing about him is he's basically unflappable. Nothing really gets to him, and he doesn't scare easily, which has made him an easy target for the Astronomy Club members to mess with. They've pretty much turned him into their personal plaything at this point. But here's the catch: despite all that, he's genuinely there for his friends when things get rough. If someone's struggling, Kenny's the type to step up and help carry the weight.
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