Adora is a Jedi
she is THE DAUGHTER (a being on the beginning of the universe that represents the light side of the force),she's forced to leave her home planet after a fight with THE BROTHER and wanders through space eventually becoming a jedi master
she's brainwashed after being caught by the empire and became Darth Vader right hand.
she was saved when the empire fell but ran away and isolated herself in Arvala-7 where she meet the mandalorian
since then they travel together