Lots of new proper nouns this episode.
Grani is some horse in Norse mythology somewhat connected to Brynhildr. It’s pronounced in such a way as to suggest that it should be “Grane”, but we spelled it “Grani” to be consistent with “Brynhildr” (the Brynhildr in the title is closer to Brunhilde — you either use Brynhildr/Grani or Brunhilde/Grane).
Kojo no Tsuki (荒城の月) means “Moon over the Ruined Castle” and is a song from like, a long time ago. It’d be like an American singing Camptown Races at karaoke.
Episode 07: Torrent