FluffyQuack
[14] Master
I initially thought that was a different Sophitia costume too, but that's her SC6 1P:It is also interesting to point out, that is also a old Sophie Costume and Taki too(Look at the pauldron) and also has her old shield, the Owl shield.
Maybe the idea of 2Ps being older costumes can be correct.
The hair ornament matches up, and the pauldrons are completely identical. Taki looks like her SC6 1P too.
Higher quality version of the Cervy picture I posted earlier and another one: