A Reiki is a creature made of pure essential energy. Depending on the essence it is made of, it obtains the ability to manipulate properties of that type. When a Reiki is born into existence, it grabs surrounding materials, from rocks, trees, or anything else to build a body around itself to protect it.
Chronowalkers are a breed of Reikis that are made of the essence of Time. When they are born, they will often stop time to assess the situation around them. If needed, they will relocate people and creatures to get them out of harm’s way.