Couldn't find Rumia, Rinnosuke, Tokiko, Suika, Aya, Satori, Kokoro, Nemuno and Chiyari provided it contains all Windows era touhou characters. The Wakatsuki sisters are confirmed to not be present

Edit - The artist said on twitter that they forgot to add Aya and Chiyari and they didn't know Tokiko at all.

Alixiron said:

Couldn't find Rumia, Rinnosuke, Tokiko, Suika, Aya, Satori, Kokoro, Nemuno and Chiyari provided it contains all Windows era touhou characters. The Wakatsuki sisters are confirmed to not be present

I found Rinnosuke, left most spot in the human village. It appears Rumia is mistaken for Medicine, however, not sure where Medicine is. Someone seems to be between Yuuji and Utsuho, someone between Futo and Ringo, not sure who else I see. It looks like there's two faces in the south forest making a > < and ^ ^ by Mamizou, but it's hard to say if those are anyone or just the shading (though nothing looks like that shading wise around it). Someone behind Momoji, or perhaps that is Momoji and someone in front of her is mistaken for her? I see ears on the unmarked of the two. Someone unmarked above Momoyo as well.

Alixiron said:

Couldn't find Rumia, Rinnosuke, Tokiko, Suika, Aya, Satori, Kokoro, Nemuno and Chiyari provided it contains all Windows era touhou characters. The Wakatsuki sisters are confirmed to not be present

added Suika, Kokoro, Satori, Nemuno and Aki sisters

MeiYuyu said:

I found Rinnosuke, left most spot in the human village. It appears Rumia is mistaken for Medicine, however, not sure where Medicine is. Someone seems to be between Yuuji and Utsuho, someone between Futo and Ringo, not sure who else I see. It looks like there's two faces in the south forest making a > < and ^ ^ by Mamizou, but it's hard to say if those are anyone or just the shading (though nothing looks like that shading wise around it.)

Fixed the note for Rumia. I am guessing the girl between Futo and Seiran must be Medicine then

MeiYuyu said:

I found Rinnosuke, left most spot in the human village. It appears Rumia is mistaken for Medicine, however, not sure where Medicine is. Someone seems to be between Yuuji and Utsuho, someone between Futo and Ringo, not sure who else I see. It looks like there's two faces in the south forest making a > < and ^ ^ by Mamizou, but it's hard to say if those are anyone or just the shading (though nothing looks like that shading wise around it). Someone behind Momoji, or perhaps that is Momoji and someone in front of her is mistaken for her? I see ears on the unmarked of the two. Someone unmarked above Momoyo as well.

I think those shapes under Mamizou are supposed to be ears of the other tanuki and the character behind Momiji is an unnamed wolf tengu. You can also see some other kappa in the river next to Nitori.

Man, this people tagging characters are insane, all i can see at mosts are just two pixels of color