Rossweisse

Once a legendary Valkyrie serving as Odin's bodyguard, this serious-minded warrior transitioned into a reincarnated low-class Devil serving Rias Gremory. Now a teacher at Kuoh Academy, she is famously nicknamed the "100-Yen Shop Valkyrie" due to her habit of hunting for bargains. While she specializes in versatile Norse magic and devastating long-range elemental attacks, her evolution as a Rook allows her to deploy powerful defensive spells capable of neutralizing even the strongest Balance Breakers.