Board Thread:Anime/@comment-26131853-20150718221255/@comment-24930713-20160131002428

RaggaR wrote: It's nonsense, alright.

But did you ever wonder why people actually started the "Mikasa su casa" trend?

I imagine just because it rhymed. It would also be a play on the actual phrasing, "mi casa su casa" > "Mikasa su casa". Where the only difference is the lack of emphasis on the first two syllables in her name.