The dark swordsman enters, his sword still drawn
He is nice, kind, polite.
He is even helpful.
Until he sees blood, then he goes mad, insane with bloodlust.
His Katana, Rist, burns with fire, and his cloak which is just there to look cool.
No-one knows, he appeared out of the aether when Arcanon failed a summoning spell, and has wandered since, looking to slay the mage.