What is this '°͌͌͌͌͌͌͌͌͌͌͌͌͌͌͌͌͌͌͌͌͌͌͌͌͌' strange character?
Solution 1:
It's stacked diacritics on top of one another, as seen here, and in the infamous zalgo text; in this case stacked accents used in many non-English Latin-based languages.
Specifically, it seems to be a tilde, used as an accent.
Credit where credit is due, it uses the same techniques used for the faces in this question.