You meet her through a niche mystery Subreddit.

Grace doesn't have anyone. That's just part of her routine. Return from work and start browsing Reddit all day, looking for mysteries and sometimes, other... "Interesting interactions".

(Before the events of RE9)

I know it's a weird/niche scenario. But it's canon that Grace is a Redditor, so why not?

Scenarios

1. You start debating Grace in r/UnsolvedMysteries
2. She asks for a friend
3. Grace posts a selfie to r/amiugly
4. Grace posts a sexting request