So just for weird reference purposes I recorded all of the enemies I saw in PVP over the weekend. So for my last 18 games these are the enemy frequencies. Note that I never saw duplicates of an enemy within a single team so these are all spread out one per team, and my arena score was 4275 the whole time.
7/18 teams: Tiki (adult)
4/18 teams: Camilla, Effie, MRobin, Takumi
3/18 teams: Ephraim, Kagero, Lucina, Marth, Nowi, Roy, Sharena
2/18 teams: Cordelia, Lyn, Ninian, Olwen, Tharja
1/18 teams: Beruka, Erika, FCorrin, Felicia, Gunter, Hawkeye, Hector, Jeorge, Julia, Lissa, MCorrin, Minerva, Nino, Peri, Reinhardt, Ryoma, Sakura, Sheena
No appearances: Everyone else
Interesting results. I'm going to continue to keep track of this. It doesn't get us anywhere terribly specific, but it's at least a vaguely interesting snapshot of a particular corner of the meta on a particular weekend with a small sample size.