The clothing is "Summoner," available here in the Marketplace.

There's a V4 version and a Genesis 3 version. Clothing textures look like this, which perhaps means that's the G3 female.

https://www.renderosity.com/marketplace/products/121195/dms-summoner-genesis-3f

Not sure about the character. She looks like any of a bunch of very similar Poser/DS characters.