When all celestial bodies from a distant universe, in a distant galaxy aligned... RT was born the same way the universe was-from a singe, super, ultra, hyper, concentrated point of energy. Once the energy capped, Reality Termina was made, along with KC. Reality Termina, being bigger, was like KC's superior/older brother, but KC doesn't remember. Kenichi remembers everything from the astral birth, acting as a loyal companion to RT. RT was born with vast power like no other, able to manipulate the 4th dimension with ease. After he discovered locations beyond multiverses (realms), he got the idea to control every realm existing, not liking the waste of precious power.
KC, a being of creation and positivity wasn't all so positive when he was first born. In fact, KC was the god of both creation in destruction. When he scavenged galaxies to find the source of his existence, he deconstructed every planet to find it. After eons of trying to recreate planets and no life, he get aggravated. Eventually, he stumbled upon Earth. KC was in awe when he looked into the planet, he thought he found HOW he was made. But after studying, he realized this isn't how, and humans are made a different way from how he was. Determined to create, he locked his destructive power deep inside his mind, recreating living things with distinctive features.