>>50179018
I agree with the Sumi part, but
>she like sinflcitng violence on youkai
Not any more than anyone else likes fighting. She sees herself as a hero, and just like Sumi abstracts what she sees as "fun fantasy fiction", Sanae does the same but sees herself as a hero or protagonist in a video game. She acts like she's taking quests in LoLK. She's only enthusiastic about it in UFO because it's new to her. She's not a sadist. Her gohei doesn't even see enough use to be possessed during DDC.
>Suwako and Kanako would probably be fine in Gensoyko without her
A god needs a priest and Kanako already isn't a very likeable person to begin with. Suwako doesn't even leave the shrine 99% of the time. Sanae is there to run advertising, which she is exceedingly good at. If she were really dead weight, she wouldn't have been needed, ever.
That's not to say that she's a goody two shoes, she's selfish, she's an asshat, as are all of them save for like, Keine, maybe. But she can be a good person at times and acts selflessly to help Reimu and cleans up her messes.
I don't know how much of what she does is "self interest" and how much of what she does is "Kanako's interest", because in the end she's not the one benefiting from it. If she were truly a power hungry megalomaniac then I don't think she'd be content with being Kanako's lackey forever. You make her out to be more cunning and power hungry and malicious than she really is, when I don't think she really has the capacity to do that on her own, when she, most of the time, acts under orders from Kanako.