Univa is a Dream Demon, just like Bill Cipher, and he looks like Bill, but rainbow, and unlike most Dream Demons, he is actually nice. He is always watching Bill, and is yet to know about the Pines family. He knows EVERYTHING except the Pines family. You could ask him "What is 9 + 10?" and he will always say 19. Apparently, his eye acts like a kaleidoscope. He sees everything in a triangle that has been mirrored like kaleidoscopes. He only knows Dipper, but no one else in the Pines family. Soon he will actually try to defeat Bill and Gideon, and save the world from evil.