I went waaayy overboard with these guys. They show up in the story once, and not even for very long. They literally talk to the main group then leave :I
They do have a bit of impact on the story development though despite showing up after the mid-way point.
This is essentially what a strong, experienced slayer group looks like; good variety of classes and an attractive pure demon plus showing of their blood armour to attract jobs.
The BA is any clothing that has the same dark red as the weapons. It’s expensive (which shows off experience) and gives boosts in strength, speed, or defense (which shows off power and capability).