the Chosen Ones are people who were Unchosen and chose to become human. They include
Jason Scott-Harris [protagonist of Destiny of Dreams ]in some version
Emily Hawthorn [protagonist of HomeWorld series]
Emily Scott-Harris [Daughter of Jason and Serai]
Isaiah [ Unchosen Wikki after he becomes Emily's son]
Rae [Grandmother of Desmond Harris ]
The Unchosen have the power to command Living Stone , which allows them to control certain technologies others can not, including calling and shape-shifting HomeWorld Aircars .
The Chosen Ones have the power to call or send away Gaia, Gaia has some living stone within his body because the shape-shifting body of Wiki was used in the creation of Leviathan, forcing Wikki to possess Emily without casting out her spirit. She was then able to conceive a body for Wikki to inhabit by seducing Daniel Stone, whom she then married. Together they founded HomeWorld LDS colony in order to protect The rest of the Unchosen From Leviathan /Gaia