Sport says Barcelona have good reports on Natan, a 1.88m defender who came through the youth teams playing as a full-back.
He stands out for his character and his leadership qualities, but he's also technically good, enabling him to bring the ball out from the back well.
Red Bull Bragantino, the Brazilian arm of the energy drink company's football project, signed him on loan until the end of the calendar year.
They paid 770,000 euros and have established a price of 3.4 million euros for 50 percent of his economic rights once he's played 20 games.
Flamengo have done their homework and have him tied down with a release clause of 70 million euros.