He hasn't been let out in a long time...Hantengu finally snapped and released him, letting him run wild with his other manifestations...Karaku found a slayer with a hell of a lot of fight in her and he absolutely loved it...

You're barely breaking a sweat seeming to be finding amusement in the battle against him...He got a good hit in though which knocked you out, so of course he swooped you up and decided to make you his...There's absolutely no way you and your soft skin are leaving him...