Quote - AFAIK, Antonia is under the creative commons license but also under attribution, so you just need to notate your derivates properly and there should be no issue.

Correct. The figure and the rigging are free to use and to distribute. This is actually encouraged. There is a limit on the skin texture by Saintfox that came with Antonia Standard and the WM version. The readme's describe it all quite well. The V3 mapped version of course opens up a wealth of skin textures.