Santo is an eight year old boy from an alternate reality Xanth which is fifty years into current Xanth's future. His talent is to create any kind of hole. He was brought to current Xanth by Asrtid, Fornax, and Dysnomia along with Firenze, Squid, Win, and Myst. The children found when they are together, they are connected. Astrid and Fornax were trying to find a family to adopt him.
Prior to his adoption, Santa did not feel worthy of being adopted and created a hole to Hades. Astrid followed him there to find out why. Santo revealed he was gay. Metria attempted to adopt Santo, however, she could not say his name correctly which invalidated it. Fornax convinced Nemesis to marry her and adopt Santo.