Considering this: http://www.pixiv.net/member_illust.php?mode=medium&illust_id=7449736 It's Chen's shikigami from a future Gensokyo where she got powerful enough to get a Shikigami of her own (and thus, continue the chain of Shikis)... and when we are to the fourteenth child of Miare.
Final_guard said: Okay,if I remember right: Yukari=violet Ran=purple Chen=orange So does that mean that, ultimately, this one will be stronger than her?
Little correction Ran = Indigo
And if we take into account visible light frequency intervals and "color spectrum wheel" we get:
Violet > Indigo > Green > Orange
So if Roku = Green Then apparently, she would be stronger than her master would. Roku or whatever her name would be... should be "red" to continue the colors chain.
Conductor Sign "Tanuki Orchestra""The Tanuki of Kachi Kachi Mountain"Chen's ShikiTransformation "Bunbuku Chagama"Change Sign "Cover Your Head, Watch Your Behind"Ability to Change Shape at WillRoku
Kanji means "green"