Nothing. No one'll ever even know you were gone. Like...my grandpa and Katara and everyone but Bolin and Asami are from a long time before I am, but their being here was never something that happened at home.

[ She's not sure how it works, she just knows it is A Thing. ]

Sometimes people go home for a while, and then come back remembering more things from home. But while they were at home, they forget Luceti entirely.