What sets Cooro apart from other +Anima is that he has no recollection of when he became a +anima, or rather, he remembers always being a +anima. His phenomena is explained in his past but he also has the ability to sense other +Anima or recognize when people become +Anima. Aside from these attributes, Cooro also differs in his appearence. Most +Anima are different in some ways. Cooro is that of a crow, and crows are mostly scavengers, so Cooro was given wings and feathered arms. It may so happen that the +Anima's gift mirrors the person's heart and inner desires.Shinon was a boy who was trapped in Maggie's Coliseum, a decrepit stone building where children were made "friends" (slaves) to Maggie. The children who lived there wanted desperately to escape but knew if they provoked Maggie they would meet a horrible fate. Shinon met Cooro, Senri, and Husky when they stumbled upon the coliseum one day, and met the imprisoned children. Shinon could no longer take the torture at the Coliseum and while outside one day, saw a group of white swans flying over them. He cried out in agony and the spirit of the swans heard him and he was born as a +Anima. The other children exclaimed, "He had been a +Anima all along?" Cooro knew better:
Cooro finds that Jesso, with the wings of a bird of prey, acts the same in the sky, picking off smaller and weaker +Anima. Instead of having claws like Kazana, Jesso carries a short knife. He claims that he must win the race in order to live an honest life, because he had spent most of his life stealing to survive. Jesso's +Anima is not revealed, but it is possible he is a type of Hawk or Vulture. Lyra is a childhood friend of Cooro with a Swallow +Anima. They reunite in chapter 49 when Cooro enters the +Anima race in Sailand. At first, the audience seems to be unsure as to who Lyra is and why she is giving Cooro the cold shoulder. Cooro is eager to greet his old friend, not seeing her in so many years, but is shocked to see her because he did not know her as a +Anima. So he had to think, "What happened to Lyra for her to become +Anima?" Cooro only wants to have a friendship as he did before but she refuses, only to reveal her jealousy.