A Monstrous Affair
Devil of the snow and Ellis's hot notmom
Terrifying and hot <abominable> who bought Ellis’s house even though it was in one bajillion yenyens of debt. Did so because she’s aware of the bounty on his head and because she’d rather see Ellis sink deeper into a peaceful life than get killed on his way to the Monster Lord’s castle by the people who’d rather do that with the bounty on his head.
Turns out to have been Ellis’s master’s first apprentice before the trickster martial artist happened. Died at some point and turned into a yuki-onna afterwards. Hails (hah) from the Mist, and might very well be the source of Ellis’s nightmares.