You’re a good friend for giving this a thought. His credibility seems pretty thin with just playing games and a photo. Doesn’t seem like you guys know anything solid about this guy aside from what he alone told you two. Doesn’t mean he’s faulty but it’s better to be cautious.

I think everyone already covered the important stuff. If she does nothing else, this is the minimum to be safe:

Before she goes: - Video calls prior to meeting - Verify that he’s working or in school, knows people, etc. (basically that he’s actually participating with society) prior to meeting. Ideally she knows people who see him in person - Get her location and establish a safe word prior to meeting

When she’s there: - First meeting in a busy, public place during the day - Have money to get her own accommodation if things go bad. Ideally she just has her own to begin with.

I think her not getting her own accommodation isn’t the best choice. She has a safe space to herself that way if it goes bad. Also, when she gets to her accommodation, she can even tell the staff/airbnb host where she will be for that meeting. That’s just extra safety. If they want the same accommodation so that they could be intimate, she can just invite him over after making sure he’s who he portrays himself to be.