TempestNotion
Since Reine and Rudeus are taking different paths and each one has what the other does not, in Reine's case it would be her Touki and her fencing talent, in this story you could make her part of the cycles that Orsted lives (So that every time that Orsted goes back in time he finds Reine as an ally, making Reine's existence a constant in the world like Paul, Zenith, Lilia, Norn, Aisha, etc).