1. So the holy swords are named after angels, it seems. Zagan said that they might be living beings that were turned into swords, so maybe they were once actually angels themselves?
2. Barbaros X Chastel? 👀
3. I always dislike when song lyrics are written in manga. You can't imagine what they might sound like when sung because you have no musical cadence or rhythm to match it to, and it doesn't seem to follow a pattern or structure like a poem might. So it's just flowery sentences accompanied by 🎵 and 🎶.