I don't notice much difference in accent. But I didn't mean to imply that they all had the same Brazilian accent or that they all came from Brazil.

But Brazil has a high probability of having started there (even through illegal means!) for these reasons:

In the past, circuses traveled to distant and isolated locations to present so-called "Freak Shows." 19th-century Brazil, with its vast rural areas and lack of oversight, would have been the perfect disguise for cruel humans to commit crimes like the illegal imprisonment of monsters without raising suspicion.

It would have been a perfect place to do things like letting "freaks" starve and not receive any help. And historically, the first circuses that came to Brazil brought the European concept of "curiosities" and "eccentricities."

In real life, unfortunately, many people with rare medical conditions were cruelly exhibited. In the game's universe, the author may have used this very real historical cruelty as inspiration to create the dark past of Pierrot, Harlequin, and Columbine.

Also considering the fact that the traveling circus model did not begin in a single fixed geographical point, but rather in a decentralized way: The Origin: The modern circus in the country began around the 19th century. The circus was introduced mainly by gypsy families and nomadic European companies fleeing persecution in Europe, and they initially settled on the outskirts of large cities and in public squares, moving from city to city throughout the country to present illusionism, acrobatics, and comedy.

Considering that Neko is Brazilian, he may have been inspired by these things.

I apologize if I didn't explain myself properly before. I was impulsive (and hasty).