Oh man, what if the twist is that Lauriam doesn't have it but a third party (the killer) does
WHAT IF ELRENA HAS IT
Wait, but supposedly one of the five is an impostor anyway, because Strelitzia was chosen as a leader herself.
...Imma bank on Brain having two, Light Yagami style.
Correct me if I remember wrongly on this, but I recall Lauriam so far never being shown holding one of the green rule books, neither during the first meeting in the Keyblade Graveyard (where only Blaine shows off one), the meeting about the spirits/splitting of the Unions (where I don't remember anyone taking out their green book) and the most recent one where everyone except Lauriam (who isn't present) takes out their book.
Impostor or deliberate Infiltrator? The five leaders are the only ones supposed to know the overall truth and have recources at their disposal no one else has, so becoming part of that group could be very important for someone even if they aren't Strelitzia's direct killer.
If only four books are present among the five right now that would prove a third party has one but
not prove that they are the killer since as already said, it is possible that the killer passed on the book to someone else in the meantime, when having illusion powers probably even as Ava while doing it and thus rousing no suspicions.
In that case the one of the five who isn't supposed to be there wouldn't even know that they are taking someone else's place.
What would Blaine want with two green rule books though? In all should be written the same stuff, shouldn't it? There isn't yet the topic of yet another lost page on the table, is it?
If Laurium is her brother, maybe she told him everything? Which is why he shows up her in her place and all and why he's unwilling to tell any of them exactly who he's looking for and why? I can't imagine Ava chose both siblings to be a leader, so maybe Laurium is technically the intruder, but he's there to spy/figure out what happened to his sister?
I can see Strelitzia spilling the beans even if she was supposed not to, although in her scenes she seems to be worried more about the Player Avatar than anyone else.
Yet there she is also willing to at least partly break the rule of secrecy imposed on the whole thing and her Chirithy
clearly doesn't like that.
A few scenes later the Chirithy even questions if she's qualified enough to be an Union Leader:
Chirithy said:
"She… a Union Leader… really?"
So there is definitely a pattern to it which would make it in-character for Strelitzia to tell everything about her being chosen as a leader to her sibling, regardless if it's Elrena or Lauriam as both could open up yet more paths this story could go, the one you mention being one of them.
Worse, if Strelitzia spills the beans somewhere outside it is possible that someone overheard it who shouldn't be trusted which such an information. I remember it being stated in the opening parts of at least Browser Chi (I dunno if Ux has it too) that among the Keyblade Wielders are some who are Seekers of Darkness in disguise.
I was thinking about that too, copied from my tumblr:
My Theory on Blaine’s True Identity
It is long so please click read more-also, you might be wondering why there is Gula tag there. You’ll know the second you click more, you’ll know, though.
There are many people salty with the name change from Blaine into Brain, including me. Why ? Because Blaine is not only more interesting name, it have a meaning as well. Blaine is Scottish for “tiny yellow oneâ€â€¦ Why would someone dressed in black would be reffered as yellow? And someone who looks at normal height is called tiny?
When we say “tiny yellowâ€, we usually would think of Ven. But there is someone who is tiny for his group and his color code is yellow too…
Gula.
However, Gula actually isn’t that small compared to the common teens in the unions, but clearly is the only male foreteller who can make convincing disguise of another common kid in the union.
(screenshot taken from youtube user KHIsland)
Another hint is that his familiarity with the Book of Prophecies laying on the Master of Master’s desk, yet unfamiliar with the content of the Dandelion Guide Book. In his introduction chapter, he asked the others that “are the rules absolute?â€
as if he never got the content of it explained to him by Ava.The new chapter exemplifies it more. Ephemera decided to break the rule, and he asked againâ€I thought the rules are absolute?†Lauriam dropped a loophole abuse that “it never stated when. â€Implying he was forcing himself to think the Dandelion Guide Book is absolute to fit in wit the others. The fact that he is familiar enough with the Book of Prophecies imply he always had one, and only Gula is small enough to infiltrate the Dandelion kids among the male foretellers.Not even Luxu is that small.
Ava do have illusory power, yes, but if it’s Ava herself (or anyone with solid illusory power) is the one who killed Strelitzia, then why didn’t they appear as her (Strelitzia) instead? Simple-He didn’t have it, so he had to resort to a manual disguise.
Another thing to note is that his attack’s name in the medal is Panther’s claw. A panther is not a name for a species, it is simply a name to address any big cat with melanism- case of excess melanin causing a big cat to have fur and skin almost entirely black. Gula do have black in his clothes, and is a bit tan, but those much isn’t enough to call him a panther. So who else, other than Master of Masters and Luxu, who had so much black he qualify as a panther?
That Ava told him everything but refuse to give him spot in the Dandelion makes sense, Chirithy often state they are exceptionally close-thus why he know he needs to kill and replace one new Union Leader and stole their book.
Another thing to note is that when Luxu told Ava who is the traitor, she didn't only rebuke it out of disbelief. She actually snaps and attack him (which what starts the main keyblade war). Again, Gula and Ava are close and it would make sense if she disbelief HE is the traitor that much.
I find it plausible, it also goes in a similar direction I theorized in my previous post.
Oh, and @Alpha Baymax in regards to:
The only problem that I have with this theory is that "all" of the Foretellers disappeared, and this theory contradicts that if Brain is Gula.
"Disappeared" does not have to mean being wiped out or completely erased from existence. The Master of Masters disappeared too and there are still people who believe it is possible to bring him back, most of all Gula who in his desperation thought that by summoning KH he could get the MoMs attention and goad him into coming back.
No one knows he is Gula if that theory has merit so he would still be "gone".