Greta feels like a painfully accurate nod to how we must come across internationally when we get a bit ahead of ourselves here. I cringed a bit. But overall I think she's also one of the better-written and more layered "that one German person" I've seen in fiction recently, and I appreciate that too.
(The wifi password is extremely funny to me as a local. I guess it's a bit of a meme, but personally I think it does what it's supposed to, so I'm not surprised she's fond of it.)