Also brother can you tell me why does Ella kill the mc when he reveals about his mind powers during the training scene?I wrote a big ass question so someone could tell me because I didn't get it why she did that.
Because she's evil, that's why. Nah, I'm joking(or not). It's because he has dual traits and for whatever reason, she kills the MC because of it. It's not really explained yet but it likely has something to do with the Arbiter and she could possibly extract or use MC's corpse as an anchor to summon the original trait.
I thought about this a lot because it doesn't really make any sense. Ella may be fucked up, but she doesn't want to kill the MC and forbids other members from killing him, or something to that effect. The only thing I can think of is that Ella doesn't kill MC. She just knocks him out.
Basically, for the earlier parts of the story, Ella doesn't know that MC has the dual trait. If she learns about it, she will get him to the 4th, and the 7th will attack.
The first time it happens after MC and Ella fight, we see the result.
The second time it happens, while Ella trains MC, we just don't see the result, but it's the same.
The explanation is that the 7th is after the 4th. If Ella calls the 4th, the 7th will get her and if MC is near, it will get him too for whatever it's reasons may be (probably connected to the Eye? Otherwise it would kill Ella too).
PS. I also don't think that Ella as a level 4 can instantly kill MC with a single small scale attack. He would at least stay alive for long enough to have some thoughts, ask "why?" or even try to do something. Alexis and Clark had some trouble keeping him down during deadend1, commenting on his extreme regeneration. Ella doesn't really hit harder than Alexis since both their attacks are physical. So it makes sense to me that this deadend tells us "Hey idiot, stop talking about the memory power to Ella, story can't progress that way", without really showing the events as they took place because it's already done in the past.
PS2. The second time, Ella can afford to be rougher with MC. She still has Jake and she believes in his potential. Additionally she is generally pissed that she lost that pebble whatever it is. The first time however MC is the "proof of concept", and seeing him fight as a newborn level 1 may have made her exponentially more horny.