Higurashi ramblings part two

Higurashi no naku koro ni 13/26
Well, more wtfs, I know I have pieces of a puzzle here I just can't put them together.
Piece one: Takano and Tomitake
Takano knows about the Mion yakuza family, and she knows they are using Oyashiro's curse to cover their tracks and commit murders.
When she meets Keiichi in the rain, it is OBVIOUS both of them have just committed murder, or what feels like murder.
"Did you make sure the corpse was buried properly?"
"We never met tonight."
I'm assuming Takano killed Tomitake, had Tomitake's bike in her car, and had Tomitake's body in her trunk, used false dental records to falsify her death to pretend it was Oyashiro's curse.
She came there for the sole purpose of pulling the murder off in the context of "creepy town atmosphere," having herself as the "death" and Tomitake as the disappearance.

Piece two: Rika
Rika seems to be rather sane and rather apart from all the madness, yet she dies anyway.
I think of Rika is a sacrifice.
I am not sure what killed her in arc three, though it turned Satoko against Keiichi.
In arc two she stabbed herself in the head, possibly to appease psycho demon Oyashiro Mion to let Keiichi live.
Rika is also probably never possessed.

Piece three: Satoshi
Satoko's brother was probably very similar to Keiichi.
He and Shion were in a relationship most likely from the amount of fanarts out there and her rage at hearing the words "transferred out."
Mion was also most likely jealous.
He is also most likely dead from the opening scene of episode 9.
Nails impaled in his hands and intestines hanging out would indicate that psycho Mion from arc 2 got her hands on him.
Keiichi's guess that Satoshi killed Satoko's aunt is probably correct, but I think instead of the bat he offered himself as a sacrifice to Oyashiro.
From arc one it is also implied he was at some point possessed.

Piece four: Rena
Both Rena and Satoshi were at some point possessed by Oyashiro.
This is mentioned in arc one while Keiichi is feigning sleep.
Only Rena managed to return alive.
I think that the first arc is Keiichi being possessed and that Rena was perfectly sane.
Arc three Rena has relatively few scenes.
She gets angry for suggesting once that it is not Oyashiro's curse (she probably experienced it first hand in her past at the school of broken glass), and she has a very weird grin in episode 13 when saying "Yeah I'll ask you for your clinic receipt."
Arc two Rena is curiously strong.
She says she will never "go away," when Keiichi breaks down when Rika disappears and she is with Keiichi when they confront psycho Mion together.
My opinion currently of Rena is that when she left the town she was possessed in the school of broken glass, seeing completely fucked up shit akin to Keiichi in arc one.
She managed to come back alive from the ordeal somewhat stronger, and the Rena we see is a survivor.

Piece five: Mion
Even though she flat out denies it in arc three, Mion IS the inheritor of a Yakuza clan.
She is also half demon.
It is obvious that she can get genuinely violent through just her demon self alone, I believe she is the only one who when not under Oyashiro's influence is still a very dangerous individual.
Still, I think that Mion in arc one when her eyes go crazy is Keiichi's hallucinations of both her and Rena.
However Mion getting angry when Keiichi accused her while swinging the bat is normal scary Mion (demon showing a bit).
Mion in arc two is her demon self, triggered from Keiichi giving the doll to Rena, probably combined with some Oyashiro posession also.
Mion in arc three is Mion with her demon self never having triggered, thus she denies her Yakuza involvement, and rather is a picture of perfect calm.

Piece six: Satoko
Satoko seems to have a pretty rough life after breaking the hand off the Oyashiro statue.
Her parents fell off a waterfall, her brother is probably dead by Mion's hand or possession insanity, her uncle and aunt beat her.
Has Satoko ever been possessed?
Now there's a quandary...I don't think so, I think people around her have been, and so, as a side effect it has made her extremely unstable. (Her brother, Keiichi)
In the end seeing Keiichi holding the axe near Rika's body snapped what little little trust she had in her world, it's a pity.

Piece seven: Keiichi
Ah Keiichi, how far we've come along.
Anyway, first things first.
At this stage I believe the entire first four episodes to be Keiichi being possessed by Oyashiro and hallucinating.
In the flashback of Satoko breaking the Oyashiro statue's hand, there IS a !chibi! Keiichi next to Rika.
Meaning he had lived in the town before and has forgotten on his return.
In Rena's words, deserving of Oyashiro posession because he "tried to run away." (Rena tried to run away herself, if you remember, and her posession when she broke all the windows in the her new school and beat up her classmates was the result.)
Keiichi in arc two I think is sane, batshit Mion has enough insanity for the entire rest of the cast in that arc.
Arc three is a problem.
Keiichi actually survives the entire ordeal (no crazy last minute psycho undead Mion showing up or is it leaving the viewer in suspense) and his actions completely originated from within himself ("I want to protect Satoko") instead of reacting to perceived threats. (Like psycho Rena/Mions)
However, Keiichi also shows some neurotic signs, as shown by his elaborate trap to kill Satoko's uncle which looks like it succeeds, the flashback to his student examinations revealing him to be very intelligent in respect to certain goals (cunning), his ability to hold his own against the four girls in games of all types.
The major problems that show up in this arc are the same ones that sort of felt thrown on at the end of arc two just to screw with you, that is, multiple identities.
In arc two, in the hospital, Ooshiro randomly throws out a "we found all their bodies, including Mion's, in the well," when you know that Mion just stabbed him in the stomach.
In arc three, ALL FOUR girls claim to have seen Keiichi at the festival, shooting a gun for stuffed dolls, eating ice cream, watching Rika's performance, when he most assuredly believes he was killing Satoko's uncle and burying his body and meeting Takano (who probably just killed Tomitake.)
The evidence is all there, the uncle's motorcycle was thrown into the lake, along with Satoshi's bat, the hole was dug according to the investigators.
But where is the body then, and who came back and beat Satoko after Keiichi supposedly killed him?
It seems to me that Oyashiro, instead of directly working against Keiichi by possession this time around, seemed to be something that he randomly controlled, by directing it against people he didn't like (like the ENTIRE town being raped by volcanic gas? geez)

That's it for now, I'm all out of analysis, and I'm avoiding the spoiler threads like mad.