Bunny Nun, don't go professional wrestling Heel on that poor duck.
The two figurines on the top of the cake are just perfect!
The duck she's about to hit has icing on its foot, which you can see came from the right side of the cake, where it left a footprint and tracks. That being said, the icing on bunny's face suggests she took the bite out of the left side.
Yuuma: Gatherer and Absorber; Miko: Hata no Kawakatsu; Cirno: Earthly Mother Goddess; Satono and Mai: Goddess of the Backdoors; Larva: God of Sericulture; Marisa: Star God; Yukari: Sage of Gensokyo; Kokoro: Shukushin God of Noh Dances (The only one I am confused on, I tried googling what Shukushin was with the exact Kanji used here and found multiple different definitions); Flandre: God of the Discriminated;
Yuuma: Gatherer and Absorber; Miko: Hata no Kawakatsu; Cirno: Earthly Mother Goddess; Satono and Mai: Goddess of the Backdoors; Larva: God of Sericulture; Marisa: Star God; Yukari: Sage of Gensokyo; Kokoro: Shukushin God of Noh Dances (The only one I am confused on, I tried googling what Shukushin was with the exact Kanji used here and found multiple different definitions); Flandre: God of the Discriminated;
About the God of Noh and Shukujin: if Wikipedia is to be believed, both of those circle back to Hata no Kawakatsu, who has a connection with Prince Shoutoku (and thus, with Miko).
As to what Shukujin is... the answer seems to be "Nobody Knows™". The answers seem to point towards two completely different directions: 宿 as equivalent to 夙 or 守宮 —which is a designation for a group of outcasts—, or as the 宿 in 星宿 (constellation). So, either a god of the outcasts or a god of astronomy (maybe both?). Funnily enough, what would be expected by the modern usage of the kanji (宿 = inn, so probably some sort of god of hospitality) doesn't seem to factor in at all.
All things considered... maybe leaving it untranslated would be the right call here?
EDIT: The rabbit hole goes even deeper! Apparently there may also be a connection between Shukujin and Mishaguji (so, Suwako's curse god in Touhou) and in fact, if you search for 宿神 in Wikipedia, it redirects you to the entry for Mishaguji. God damn, ZUN really made the right call making a character based on Matara-jin.