Zoe's performance is incredible. The way she sneers at Lan as she threatens him, OMG. Nyn was my second favorite character in the books, but she's my favorite character in the show right now, and its not very close.
Edit: OMG the dragon's fang of blood in the pool when she kills the Trolloc!
Edit: OMG the dragon's fang of blood in the pool when she kills the Trolloc!