User blog comment:B214/Question and Answers 4/@comment-202.152.202.132-20141010200020/@comment-16281343-20141010211335

Barge to anyone's residence: No.

"Don’t tell me that you put the marking for the magic-circle in this house when you came here last time!?”

“Bingo♪ Thanks to that I was able to come here right away –nya. So it means I can use the big bath tub of this house anytime.”"

Or is there some kind of spell or barrier to prevent it? : Yes.

"Since we performed a swapping transportation with Vali-sama and Fenrir-chan, I think the barrier on this space became even stronger. I am pretty sure that it is impossible to perform the swapping transportation once again. I think Georg-sama knows the majority of the formula used by our magic, so there is only one more chance where I can use a very special transportation from here."