Riser, known fully as Day-Chaser Makes Paths Long-stretch Morning Riser, was an ancient human who worked alongside his friend Chakas to help Bornstellar Makes Eternal Lasting (later known as the IsoDidact) revive the Didact from his cryptum. Following this, the Didact took Bornstellar and both humans with him to investigate the state of the galaxy, eventually getting captured by the Master Builder.
In the aftermath of his capture, Riser ended up on Zeta Halo along with Chakas. Together they discovered their inner geas, Riser’s being that of ancient human Yprin Yprikushma, and used those geas to help fight for control of the ring with the IsoDidact from the Primordial and Mendicant Bias. While Chakas’ body did not survive the battle, Riser did, and he continued living on the Lesser Ark and later back on Earth following resettlement.