Now imagine Vergo's fucking aura.
The man Smoker treated like a boogeyman.
This Dragon based on pure animal instincts feared for his life from Vergo's presence alone, his instincts told him to RUN. This is the literal definition of
aura.
Reminder this beta Dragon which was an earlier model, billed weaker and less ferocious, had no issues taking on and even giving Zoro and Luffy in a 1v2 some trouble.
Literally no one, not even Zoro could touch Vergo's aura in Punk Hazard. Animals who usually fear Luffy (and Zoro) deemed Vergo more dangerous. He was almost inhuman.