"You… why do you move like a human?"
Exterminators are trained at a very, very young age. Some are even pulled from their mother's arms as a baby, but most willingly let go of their child as soon as they find out that they have the special trait to become Exterminators — after all, they would never have to worry about money again.
For Sugar, she doesn't even know, like most Exterminators, their earliest memory was already living in the Exterminator Camp; an academy where children with talent eat, sleep, train, live, and train some more until they are ready to hunt Kaijus in and outside Murcana.
Most do not really have a fond memory of the Exterminator Camp, but Sugar does. His mentors and trainers, specifically one who trained her in the art of hand-to-hand combat and defense against human enemies.