Originally Posted by
Cursed by Fortuna
The main issue I have with this is that as a theory goes it's pretty unverifiable in some aspects. In the case of Beasts I, II, V, VI, and VII we either have only seen one qualifying member of the group, or in V's case none at all. This also clashes with existing information in that Prototype Arthur is supposed to be seeking out and hunting Beast VI, not V (assuming excalibur is associated with those who hold grand Saber class).
Beyond such it relies on the assumption that each of the 7 Beasts is set or predetermined, this theory would imply Beast I was already predetermied to be Goetia even before it became the first beast and thus Grand Caster and by proxy the caster class was molded based on the idea of someone who can beat Goetia. As mentioned prior while each "class" of beast may share similar aspects (beast the IV being monsters, Beast VI being based on Biblical opponents and enemies of God, etc.) It's near impossible to verify that in the case of those like I, II, much less V, and as for VII I fail to see what good a pole that holds a texture in place is when specifcally there is no texture to begin with (I don't think something that holds X together works if there is no X to even begin with).
Beyond such not all beasts in the same class behave the same. Looking at Beast IV "Fou" had a nature of comparison and it's unclear who would have opposed him and his abilites seem to be growing strong enough to match his foe or growing stronger based on how many humans there are (something to that effect), "Tamamo Vitch" had a nature of Treasuring and could control beasts and create a reality marble where humans couldn't exist or survive (I think, I'm not that clear on Tunguska). Although we never see her Taigong Wang mentions Daji, seems to think the new Beast IV is Daji, and thus implies that she may qualify as Beast IV. Her nature is collapse, and no idea on what her powers are.
Another issue is that if this theory was correct then Taigong Wang, someone who hunted and sought to beat Daji should at minimum qualify for Grand Archer. But he doesn't, taking his word at face value he qualifies for Grand Caster and Grand Rider, meaning that clearly not all Grand Riders counter all Beast IV (or maybe Daji counts as Beast VI? who knows.) Even then where would Merlin fit in does Morgan, Uther, or Artoria count as possible Beast I canidates, as they are the only things I can think of people or things he "created" that he could maybe try to fix.
Pretty well in theory.
Avengers come in two flavors
"Those born from hatred speak of love... and they would show compassion after experiencing cruelty." and "Those born from love speak of hatred. Those who experienced happiness meet their end through betrayal."
I'm pretty sure Julius Caesar who was symbolically betrayed by the Roman people who forced his hand to split with his wife and son due to the rumors about Cleopatra seducing him, or his betrayal and murder would count as making him qualify for being an Avenger.