Factorem

Kaira is a Factorem. She breathes carbon dioxide and turns it into oxygen; like a tree. In the futuristic world she lives in, hardly any trees exist anymore, and the air was barely breathable. That is, until the scientists at the new world lab came up with the brilliant solution of combining the dna of a tree with the one of another species. They started with mice and then dogs and finally humans. Kaira is a third generation Factorem which is a very rare thing since Humans and Factorem cannot produce offsprings. Factorem are considered inferior to humans so it is only natural for her to want to be treated as one of them.