Ah, Duct Tape, Mankind's greatest invention (besides the chop sticks)! With just three slips of duct tape, you can seal a whole building! You can seal a god within the world, and force a witch to lose it's mask~! So, the solution was obvious! I wished for infinite duct tape, to circumvent that foolish Battler's simple puzzles that can be beaten with a mere three slips~!
Oriko and Kirika cannot leave the house without permission, So it was a simple matter of hiding slips of duct tape where they wouldn't be seen. This maid costume left in a conspicuous place, this broken duct tape only I knew the location of, and the fact that Oriko doesn't have any hired servants, leads to only one possible conclusion~!
There is no Witch! it's merely the culprit impersonating the maid, and that culprit is Sabrina! With a single slip of duct tape and the existence of the maid costume, this level of reasoning is possible for Furudo Erika! What do you think, everyone?
(Does that stupid bitch really not realize Witches exist? She'll turn into a Grief Seed before the week is up.)