I don't know how it got here, but I couldn't let it leave. I had to kill the creature to ensure it wouldn't go tell all its friends about my honeybee colony (or my people colony, for that matter). After reading more about Vespa mandarinia, I learned that they excrete phospholipase enzymes, which means their venom is literally capable of dissolving flesh. Their stingers are nearly 1/4 inch long, and the feeling of being stung has been described as "feeling like a hot nail being driven into my leg."
I'll keep my fingers crossed that this was a freak incident and somehow this was the only one around. If not...well...we'll cross that bridge when we come to it, won't we?