Finally, some goddamn Alice dialogue ! ... is what Alice fans would have probably loved to say lmao
It's good to see that there is a proper reason given to this manga's events seemingly following the orders of incidents happenings instead of just being a simple revisiting of the old cast.
While we haven't been told outright who the Eternal Criminal possessed after possessing Yuyuko, I'm still willing to think it went the getting-served-by-Youmu-to-the-guests route, as Yukari says that she probably got possessed before telling Ran and Chen to set up a perimeter in the netherworld.
Anyway, here's what we currently know about Mima the Eternal Criminal's profile :
-Is a vengeful spirit
-Sort of a badass down there in Hell
-Wants revenge against Gensokyo
-Got some sort of vendetta against the Youkai and Hakurei Shrine
-Been around for long enough she could watch over the very old Scarlet Mist incident to unfold
-Strong enough to possess even Yukari
-Probably SUPER petty, as Satori who knows her a lot assumed she must be snickering somewhere for outsmarting everyone in the netherworld, while Reimu who's goot great intuition assumes the spirit is doing all this to scare her
There is absolutely no way this is some rando we're dealing with this time, considering all that ... In WaHH for example, there was a proper explanation given for Aunn's familiarity with the Hakurei Shrine, but the Eternal Criminal this time sounds like someone who's had personnal involvement with the events of the world ... it would be pretty difficult to shove in a completely new character, so hey ... the temptation to say that it's Mima is very strong this time ...
She also seems to have a liiiiiiiittle penchant for possessing non-Reimu characters who enjoyed playable status. This might quickly get proven wrong as we enter Eientei, where most of the non-Reisen ladies haven't been playable yet ... If I'm right here, then Reisen is gonna be the next one to experience a surprise early retirement. But if it's not her, then I'm curious to see if the Lunarians who consider themselves as Humans are gonna be hardly affected by possession like the "normal" humans, or if they're gonna get KO'ed too.