Just imagine it. Your looking for someone to do Trials, or the Raid, so you use an emote where your guardian just pulls out a sign that says LFG on it until you tell them to stop.
Now that's an emote I'd waste my money on.
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No. The LFG emote would have to be your guardian putting his gun up to his head and pretending to blow his brains out, seeing as that's how most of us feel when the thought of having to use LFG comes to mind