The Witcher 3 - Avallac'h's laboratory - Part 23
If you want to talk about Yennefer of Vengerberg more in detail or just get more information, come to the official forums:
http://forums.cdprojektred.com/thread...
On the forums I also try to explain why Yennefer behaves like she does in certain situations, these videos here are the source material for that:
http://forums.cdprojektred.com/thread...)