Why would Ella resist Alexis power? It's already mentioned in the game a level 4 can at least manage to stand up against a level 5, perhaps even has a chance to win depending on their strengths and weaknesses.
Resisting Jake's powers did not come from the monster inside MC.... MC resisted Jakes power in the room with the twins when returning to the frat house. Sure the "monster inside" breaks the order in jail (or helps breaking) but we know Jake has been giving suggestions for some time already....
As for the twelve, i don't think number 1 is the authority, the monster inside just states he does not bow for number 1's authority.... My guess is the twelve is more like a group of equals all belonging to the highest order in the monster picking...
Ella tells you the monster that made you (and her) is the strongest there is....
Jake represents the first, Michael the second, Alice the fourth, MC and Ella probably the third?
If you eat Jake you are afraid and it seems like you sort of get driven out by this number 1, but that monster gets entangled and pulled under ground before it ends.... My guess is your inner monster kills Jakes inner monster there... That or it's a memory from the other dimension between these 2 numbered creatures...
In your original post, I thought you were referring to Alexis power there. That's my bad, you were referencing the HERO operative at Lvl 3 with Laurie(lvl 2).
The MC doesn't resist Jake's power fully during the Amber and Liz thing even though he ignored Jake's command. He doesn't realize anything wrong in that scene and that Jake made them strip until after it's broken later. The MC didn't break Jake's memory seal until after Christie and 4th(or 3rd) told him. This happens right after he leaves Hero's base. Before that, he couldn't figure out who was making him forget. If he had resistance to it and could break it by himself, he wouldn't have kept forgetting over and over again up until the prison scene.
As for the Numbered stuff, a few others and I have went over it here and there in the thread. The Numbered are the most powerful monsters in the game. The 1st to 6th are the only ones remaining. 7th through 12th are either dead or in a deathlike state. Above them, possibly, is Valravn's "King", the Monster you see on the Dead End if you fight Ella with 7 Power Points earlier in the game. They're also most likely extensions of a greater monster going by Valravn statements and Xanthe(not confirmed yet but implied by their given names).
- The 1st is "The Authority"
Jake's Monster Parent
- The 2nd is "The Power"???
Michael's Monster Parent
- The 3rd is "The Body"
Ella's Monster Parent and the MC's if he chose it in the beginning.
- The 4th is "The Memory"(Pink Monster at the start)
The MC's Monster Parent if you chose her.
This is all confirmed in the game(besides Jake and Michael's name). Alice's Monster, The Fairy, tells you to say high to the 3rd or 4th depending on who you chose. Valravn further proves it by telling you what part your monster represents and if you pick the 3rd you share him with Ella. He also stated that the "2nd" has descended when Michael encountered it.
As for the 1st Domain scene, that was most likely the 3rd and 4th dragging the 1st down. The MC went too deep while devouring Jake and got pulled in to it's realm.