@terminexia That's the character's title. You know, like how Touhous have those silly titles with them.
@Skribulous Yes, that's it, he wrote Advent Cirno, forgot to mention that.
And the OP and ED was made by IOSYS, and a significant amount of the character designs are Touhou-inspired to the point of some looking like actual Touhou characters to an extent. It's like one big mashup of tributes to Touhou but with Shakugan no Shana as the story's premise. meh