At the end of this wish (I)

After her mother died, Munin, a young sorceress, has to reunite with her last living relative: her cousin, leader of the Rebellion against the biggest empire that the Earth has ever seen. With no time to mourn whom she lost, Munin has to learn how to fight if she wants to stay alive.
Meanwhile, a pair of misterious people, known only as The Guardian and The Messenger, are watching every step she takes, knowing that Munin is the key to make their wishes come true. What are their real intentions?