Board Thread:News and Announcements/@comment-4875891-20121204155137/@comment-6192846-20130304215344

It is confirmed that Blood-Stained Switch is canon. All credit goes to Máddji for the translation:

※大罪シリーズは関係有りません(※ There is no relationship between the series of mortal sin - 0:22)

It should be noted that "mortal sin" translates also as "Seven Deadly Sins" and refers to how the song is not part of that series, not that it is not part of Evillious.

Mothy's other comments on the song tie directly into the Evillious Chronicles and have made the implication that this song is connected to Ma, Elluka, and Irina. As a result of this new information, pages for Ma and Blood-Stained Switch have been created and are currently be edited to compile these new revelations.

Please consult Máddji, myself, or another named contributer on the wiki if you have any questions or leave a comment on the afformentioned pages and I or someone else will answer you as best we can.