tl;dr: "Jupiter, you're lagging behind with shopping destinations in your Ruth and Roth group." (
https://opensimworld.com/groups/1014)
Got it. It does already include Taarna Welles' famous fashion sim Savvy (
https://opensimworld.com/hop/75031; bubblesz.nl:8002:Savvy) and Klarabella Karamell's Meshmatsch which has recently seen the addition and grand opening of a fashion store (
https://opensimworld.com/hop/82702; dorenas-world.de:8002:Meshmatsch). Both offer women's clothes made for Ruth 2.0 (RC#3 in Taarna's case, RC#2 in Klara's case), but chances are good that they can also be worn by Athenas.
To make this quick, you may also want to visit Klara's other shops:
Santiago (
https://opensimworld.com/hop/78061; dorenas-world.de:8002:Santiago; you'll land right inside the building, just go up two floors; you'll find original mesh by Klara as well as Damien Fate meshes textured by Klara)
Bella Klara (
https://opensimworld.com/hop/81258; dorenas-world.de:8002:Bella Klara; don't forget to take the textures with you)
Westend (
https://opensimworld.com/hop/80119; dorenas-world.de:8002:Westend; walk to the west from the central crossing near which you've landed, and you'll find Klara's shoe store that offers exclusive Ruth2 mesh shoes)
Furthermore, there are the creations by Loru Destiny who makes original mesh clothes for Ruth 2.0, too, but who doesn't advertise them here on OSW currently.
Tryloria (not listed on OSW; artdestiny.de:8002:Glede) is her main sim for fashion.
She offers a little more at Needful Things (
https://opensimworld.com/hop/81253; pangeagrid.de:8002:Needful Things; entrance in Ruth Lane (second street) at 164, 72, 21).
While you're at Needful Things, go to the first Ruth 2.0 shop (entrance in Ruth Lane at 248, 72, 21) where you can find Ruth 2.0 RC#2 and RC#3, a complete set of Ruth2 v4 boxes, some more clothes, mostly by Taarna Welles (the tops will most likely not fit Ruth2 v4, though), and two landmarks, one to Taarna Welles' La Baronnie, one to Ai Austin's RuthAndRoth. Another store in the same street (105, 72, 21) has a few clothes made by Hyacinth Jewell before she started only rigging for her own LuvMyBod.
Hyacinth's creations can now be found at The Big Mamou on her own Groovyverse grid (not listed on OSW; groovyverse.com:8002:Welcome) at the So Last Year! shop right next to the landing point (entrance at 160, 224, 22), including dev kits and textures.
If you're also looking for more Damien Fate-based clothes, say so, and I'll list more destinations. Damien may have made his mesh templates for SL, but he has since open-sourced them, and they're now officially available on Outworldz (
https://outworldz.com/Secondlife/posts/mesh-templates/).