The dimensional transfer is how characters from Forgotton Ubiquity or other worlds can transport to the world of Kriosis. There are three ways of which this occurs:
Rebirth[]
Beings that die and sacrifice themselves for a noble cause are often reborn into the new world of Kriosis, retaining their most important memories only. They may also retain a similar appearance, or have it be changed entirely.
Dimensional Rifts[]
Different dimensional portals are scattered between the worlds, which all lead towards the world of Kriosis. Done once by Echo.
Cosmokinesis[]
The special ability known as "Galactic Pulsar" is capable of performing dimensional travel. Done once so far by Ryker Hikaru, teleporting him, Asuna, and Taiven