Ruan de Oliveira is a Brazilian jiu jitsu black belt under Múzio de Angelis and Leandro Escobar. Ruan stood out in the lower belts of the sport, particularly during his brown belt campaign (2014/2015) for his success on the mat, as well as for his eye-pleasing grappling style, with which he conquered important medals at the World Championship, Rio International Open as well as the UAEJJF Grand Slam Tour (Rio).