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You all realize that Gura is watching all of this unfold, right? I wonder how she'll respond
Anyways, Gura knows how parties work. She has been dead drunk multiple times. She is friends with many twitch streamers and is arguably one of the bigger ones at one time.
She also presumably knows what an Autist Calli is, and presumably knows her family's retardation. She isn't dumb; she browses the internet a lot, she know has an idea about Calli and Her coworkers more than /vt/, and her fans will ever know. Irl and professionally.
Gura also knows parties. And she has friends who party. I don't understand why you assume she doesn't know how to handle parties.