So Miku's speech bubble in the upper left has the same pattern of text that I assumed was mojibake in the commentary of post #7739202, with odd kanji like 縺 蜉 繧 interspersed with half-width kana and other symbols. Following the reply to my comment there, I tried a mojibake decoder to no avail, and looking for similar text, I see it in a bunch of Vocaloid song titles, wiki-pages, etc, but no clear explanation for how they work.
Does anyone who's used Vocaloid and knows what this is have any pointers to decoding this sort of thing?
