He's always there, talking about your doubles, telling you heavy is coming, pulling you into a losing match just before he calls mercy on it. How's he find the time? Is the Crucible scheduled as such that there's only one going on at any time? Even then, he's always in the Tower waiting for you to walk by so he can yell across the hallway, "Hivebane-senpai, please notice me!".
Maybe he's watching Crucible matches inside his helmet. I wonder what other things I can watch secretly inside my helmet...
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Lore-wise, the crucible is a widely viewed event, like championship sports games. The matches are being recorded and broadcasted. So he's either watching it in his HuD, or he's having some kind of viewing party, probably drinking beers and eating salty snacks.