The twin stars

What if Adora was not the last first one. What if Mara was connected to Adora but not through she ra. What if Adora already know about light hopes true plan, but didn't want to remember. What if Adora was far older then we know, but came to epheria younger.

What if there was someone else who came through the portal but was not found by the horde.

What if Adora know about who her mother was, and about her ...........

(Original au , reader insert)
(Set after season 5, all events have gone the same)
(Y/n = your name , y/g = your gender)
(*=thought)