User blog comment:Gundam Legilis/Beginning Of The End In Depth/@comment-4010415-20160105031353

Emerald's Semblance is hallucination, not illusion. Only the specific person (or people) she targets can see it. An illusion would be something that everyone in the area can see. This means that Neo's Semblance can still be illusion. It's just that she can't pull off the same tricks that Emerald. Neo wouldn't have been able to pull off the trick they played on Yang quite as easily as Emerald did.

The general public would be more pissed about a boy's actual leg getting broken than they would about his prosthetic getting damaged, since the prosthetic just has to be repaired and he's good to go, while a broken leg is actual bodily harm that puts him in a lot of pain and requires time to heal.

They're making a big ruckus because the festival and tournament are supposed to be all about world peace and friendship between the Kingdoms. What everyone saw Yang do was not in the spirit of the festival. She won the match and then turned around and injured (or at least, they think he was injured) her opponent after the match was over. That's not very friendly at all and killed the mood of peace and comradery that the festival is supposed to create. This isn't just about Mercury getting hurt. This is about Yang winning the match and then shooting him in the leg, seemingly out of nowhere for no good reason.