Brought Down to Normal: Utsuho, as she's seen partying at the Moriya shrine following the events of Subterranean Animism with her wings shrunken down and her third leg not present on her right arm.
The Cameo: Over 30 Touhou characters are visible at the Moriya shrine.
Creepy Child: Flandre, who asks Marisa to play with her because she always breaks her toys. To drive it even further home, she squeezes her teddy bear so hard that its head bursts.
Fangirl: What Koakuma is portrayed as towards Patchouli.
Framing Device: Marisa is retelling the events of Embodiment of Scarlet Devil to Sanae while everyone is partying at the Moriya shrine after Subterranean Animism.
Laughing Mad: Flandre when Marisa agrees to play with her.
Lip Lock: Fandubs make it quite noticeable that dialogue isn't paced alongside the animation. Cirno's rant after being brushed aside by Marisa, in particular, stands out for being rushed.
Little Miss Snarker: With the setting being post-Subterranean Animism, Nitori is in top form.
Laser-Guided Karma: Her remark about the Moriyas constantly causing incidents gets her punted through the roof by Kanako.
Madwoman in the Attic: Flandre, naturally in the basement. This adaptation expands on it.
An Odd Place to Sleep: Flandre sleeps in a coffin that's placed on a bed—that is, if she were present.
Cirno repeatedly boasts about her power to Marisa before Marisa flies to the Scarlet Devil Mansion, only to get ignored at every opportunity.
Patchouli plans on cutting Marisa's ego down to size after Marisa boasts that normal humans can use magic too and that she'll exterminate the lot of them by herself.
Something about a Rose: A rose motif frequently appears as decoration in the Scarlet Devil Mansion, including the lid of Flandre's coffin.
Spanner in the Works: Marisa proves to be a minor one to the Scarlet Devil Mansion crew, as she forces Patchouli out to subdue Flandre.
Stalker without a Crush: Reimu is apparently sharp enough to know when she's being spied on by Yukari, who wants to party with the rest, but isn't comfortable around Satori.