Kill Steal
When Lin Mu spotted a masked Leo running around in an easily spottable commoner clothing that wasn't even black, she could almost not contain her laughter as she coughed twice trying to hold it in.
She knew it was Jin Mu because his mask and body type were distinct and also because he looked like the only one who was completely unsure of where to hide and what to do.
'Yep, definitely the black sheep of the Mu family' Lin Mu thought as she believed that there was no way that Jin Mu was going to advance to round three and that sooner or later he was definitely going to get caught.
Although Leo did not know it, him acting like a fool played better for his cover as the retarded young master of the Mu clan, as the original Jin Mu was famous for being a good for nothing.