LE is a First Guardian.
There is one First Guardian per Session that has one.
A First Guardian is based on the characteristics of their ingredients, and target.
For Example Becquerel is not Halley.
God Cat is not the cat it was made of. [probably Mutini]
We aren't sure who at all is the target of the Alternian First Guardian is, and to make things worse is that said Guardian has two forms, so we don't conclusively know who it is based on the two forms. [Maybe Cal (likely) , maybe Caliborn (less likely)]
From what is seen, the Target is something in the Session of Genesis' Universe. [Caliborn is not]
Maybe the AFG doesn't have a target, and is simply made of his components.
The AFG's components, set aside the target are; Felt Cal [either From Kanaya, or the Felt Manor, that's an unclear spot] by Gamzee [I wonder why this sticks to my head, but the guy's the only one who was seen throughout the session with the puppet. Terezi was seen with Felt Cal long after the fact, after the Reckoning] ; an Oracle Cue Ball; Tavros', Aradia's, Vriska's, Terezi's Manuals, and Doomed Gamzee's Tome which encompasses the rise, lifetime, and fall of a demon, and the birth of another, and some code that ties the product to the Green Sun [as seen with Becquerel] .
No matter what you say, the two characteristics the two forms at least share is Guardianhood, and the Felt Motif.
And, the codes are if anything highly relevant to the form of the First Guardian [since at the very least it links them to the Green Sun] [Doc also told us what the codes were for: the Death of One Demon, for Another]
If it was a case of demonic possession by Caliborn, then it is still not Caliborn, the possession is a part of Cal.
Ectobiology modulates all characteristics of all present components, you can argue for how much it is Caliborn, but that is as far as you can go.
The AFG isn't just Cal, but the other parts listed too.
The demonic possession isn't all there is to the AFG.
LE is at that point something based on something inside Cal, if anything, the other components, and the codes that dictates his lifetime, and after his transformations, and said conditions for said transformations.
No, Boea, you don't understand. This is homestuck. Logic doesn't apply. The only things we can take for absolute fact are things that we have seen for a fact. Cause and effect isn't a thing. 99% of homestuck is a red herring, and the other 17% is hussnasty.
So the Green Sun is a bottle cap? [Hussfacts]
So causality is moot? [Say that to the Beforan, Alternian, Alpha, and Beta Sessions, the Doomed Timelines, and the Beta Daves]
Karkat's Ancestor is His Honorable Tyranny? [Blast from the Past]
The Heralds are Irrelevant? [The Roles? The Legends? The Denizens?]