Looks like Cirno and Rumia just got fried by Flandre.

Adding daiyousei, she's on cirno's right side from our perspective, slightly get's obstructed by Sakuya, and also spotted Yakumo's and Chen. (up-right from the cake)
Koishi and Satori sighted as well on far right..:

Should be everyone then.

Lol @ Reimu

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Mokou and Kaguya are having a pretty extreme drinking contest.

I wish I could drink poison.

Damn you Meiling, hoarding food is practically the only way Reimu and poor college students like me can eat!

Youmu's dress gave me a mild hnnngghh