DONT TELL ME THE 3RD FLOOR MASTER IS HER FUCKING BROTHER???

Or could be that said lover? It must be some sort of mage that controls the undead at least.
I'm guessing that brother is at the 4th floor, behind that locked door. Who can't go out without someone opening that door. At least it's someone that scares Noah. 5th floor boss, might be the dad.
And if it's the brother on 3rd floor, then who on earth have higher status than him? Mother-in-law? (?－.－)