Blackstar and Mifune the Samurai. They’ve fought twice already, the score is even. There won’t be a fourth.
The Song is Move by Thousand Foot Crutch. Just to clarify for anyone unfamiliar with the series, the girl you see at the beginning, Tsubaki, is his weapon. She’s a shapeshifter.
MAG.MOE - The MAG, The MOE.