Best friend reporting for duty! ;) Verity loves her to the ends of the earth.
Bash is around her age and went to Aurelius. He also is Alex's BFF, so if they're ex's, he would definitely know her!
Foster's dad was the one that talked to her about the Air Force recruiting, but that's a vague sort of connection. lol.
Finnley is close in age, but she went to Athena and skipped grades. However, she's very close to Annie, so they might have met through her!
Jeb dated Ash for a while and generally knows everyone. Plus, eventually canon stuff! So there's definitely room here for things! :)
Remington is also around the same age, but went to Athena! She still probably saw her around. Dahlia got back just in time for shit to hit the fan (in March '18) when Remi and Zora's Senator father was arrested for domestic violence/assault and a slew of other charges, so there's that.
Tallulah probably doesn't know her yet, but she's just discovered that she and Ash are sharing dreams so they might eventually meet through those ties!
I'm sure there are other randoms like Jordan working at Chapter One and Mal working at Java Chip, etc, where they might run into one another, but those are the ones off the top of my head that probably would know her best.