I received information that she is indeed Yoshika's mistress. And Yoshika appears together with Seiga in stage 4 boss battle, standing right in front of her mistress. That's right, she acts as Seiga's meat shield and blocks the bullets, while firing some of her own. The real problem is that she will be raised back by Seiga if the player shoots her down.
By the way, it appears that Seiga's nickname is 青娥娘々, read "Seiga nyan-nyan".
On a less related note, her name sounds really beautiful in my language. The nickname also sounds quite rythmic, as opposed to the kitty-sounding nyan-nyan. I think I have a new favorite character.
BlueFox said: Instantly, she's going to be paired with Kasen. I can see that already.
That or she will become her rival (though there isn´t really a difference between this two, is it?).
She is a "Jasen", a "wicked hermit", someone, who has the power of an hermit, but not the approval of the heaven due to her sins (for example, she deceived her family by faking her death).
Hmm, Seiga has an interesting background. She's actually married, to begin with. Well, was. Husband's probably dead.
Seiga's father was an excessively enthusiastic Taoist who isolated himself in the mountain, leaving Seiga lonely and bored. One day, she searched in her father's books and came across writings about hermits, which sparked her fascination with hermits and their arts. She eventually got married and led a pletiful life, but her fascination never died. She finally abandoned her family, leaving a bamboo piece polymorphed to her form to fool her family into believing that she was dead. Through training she became more proficient in hermit arts, but her personality didn't allow her to become a real hermit. She was too boastful, and deceiving her family was a wrong start to begin with. Hence she was never approved by the Heavens and instead became a corrupted hermit(邪仙). Later, she realized that there were lots of hermits of her level or above in her country, so she left for Japan which had no hermits, in order to satisfy her desire to flaunt. There she met Toyosatomimi no Miko, stage 6 boss of Ten Desires.
I think the characters for TD are like the "on the wrong side" type, giving that "bad guy" look, which I kinda like. I like Seiga's backstory though, would love to see an artist give his/her take on it in a doujin.
IndraEMC said: I say this is the prettiest girl in Touhou 13
looks like loli but beautiful
As a matter of fact, Seiga indeed is one of the most beautiful girls in Touhou. It's because Seiga is Huo Qing e from the Taoist folklore, officially stated to have been abnormally beautiful. I think ZUN deliberately designed Seiga in such a way that while all Touhou characters are pretty girls, Seiga is exceptionally so, being modeled after celestial maidens in eastern folklore.