Roselle Vergerius (로젤 베르제리우스 Rosel Bereujeriuseu, ローゼル・ベルゼリウス Rōzeru Beruzeriusu) "The Pitch-Black Swordsman" (「黒闇の女剣士」kuroyami no nyokenshi) is a vampire and one of the playable characters in Rusty Hearts. She wields dark magic alongside a Sword, an Axe, or Twin Swords depending on her weapon focus. Joheim is her skill master. She is voiced by Chiaki Takahashi in the Japanese version of the game. Roselle was released alongside the "Requiem" update and is the 6th character introduced to the…