Talk:Fall/@comment-5414218-20151213192127/@comment-25086632-20151213201027

Emerald likely has some sort of hallucination semblance, which is what likely happened with Yang and Mercury.

During the fight with Coco, a semblance activation sound is heard which isn't the same as Neo's when Fake Yatsuhashi appears.

The same sound is heard when Mercury says Blondie before "attacking" Yang.

Yang hallucinated Mercury attacking her, or at least that seems the most likely answer.