Rebecca Gladiator

Rebecca is a gladiator at the Corrida Colosseum who joined a tournament to compete for the Mera Mera no Mi. She is the granddaughter of Riku Dold III, the daughter of Scarlett and Kyros, and the niece of Viola.As she wanted to eat the Mera Mera no Mi, it indicates that she is not a Devil Fruit user. However, according to some of the other fighters, she is known as the "Undefeated Woman", implying that she has never lost a fight yet, but at the same time, it is suggested that she was bullied by Spartan.
Furthermore, she has been trained to fight by Kyros who was the best fighter of Dressrosa colosseum, after he defended her from many attackers, limited as he was as a one-legged toy.