On chapter 34
OH CHAPTER 34 HOW MUCH I LOVE/HATE YOU.
Ahaha, it's also the only REAL interaction we've got of Isaak-Dietrich and Cain-Dietrich in the manga. There is that bit earlier in the manga filler where Dietrich is all 'LOLZ FLOWERS, SLEEPING BEAUTY LOLZ' and isaak is all "smokesmokesmokesmoke".
Right, so. We basically have Dietrich all ":| don't smoke here I don't feel well blah blah my toy got destroyed blah blah I guess that was a bit of a failure" but he doesn't seem bothered by it. Just bothered by Isaak being there. Isaak basically reprimands him. Dietrich attempts to turn the tables, but then Cain comes out of the chair.
My shoddy translations someone put up on the forums has Isaak saying "We are but servants to our lord. Compared to him we are small and powerless as ants. But you are only an orphan picked up by an ant." Then we have cain sort of being all creepy and still i the chair and the like.
"After all, you are the same as Flammenschwert, just a toy for our Lord, a doll with pretty brown eyes."
And thus Isaak almost puts Dietrich's eye out. This is right after Radu got dusted by Seth of course.
THEN, I believe, the kicker. "Causing too much trouble will get you thrown out." And Dietrich passes out after Cain says that. And Cain steps on him.
Judging from how surprised Dietrich was this is Not a Regular Occasion. Also, guessing from how Dietrich reacted to Isaak he was expecting some sort of odd verbal spar. I assume so anyway. If we're also taking RAM as something that happened then it is quite likely to be one of those conversations. The banter and occasional Isaak pwning Dietrich conversations.
And then came the few things that were different.
1) the putting out the eye with the cigarette.
2) you're the same as Flammenschwert.
3) if you cause too much trouble you'll get kicked out.
I think 2 and 3 actually hold more sway than 1. 1 is more obvious and an immediate threat and it sure as did not help, but I think that Dietrich could deal with losing on eye. Probably traumatize him a little, but he's already disturbed. And he wouldn't LIKE it and the way I'm playing him Dietrich + maiming = some sort of horrible spiral of aksgdkasak. But that's not the biggest problem.
2 and 3 indicate that he is expendable. Cain doesn't need him, in fact it says that Cain's opinion of him is somewhat... blah. There's nothing special about him. No reason for him to BE THERE. Radu was weak and a pawn and easily used and then tossed aside. If Dietrich is like Radu than he too can just be tossed aside. That idea terrifies him.
I was going to essay here about Isaak and Dietrich and Cain and their dynamics but I'm getting tired. But Isaak was the more diligent, Cain was more neglective and they both spoiled Dietrich. That's why he's a brat. I don't think he actively realizes that Cain and Isaak are people he depends on, but rather if they were to change/vanish his world would just be so different it would blow his mind. It's not something he's considered.
I also take this to be Dietrich's reaction when too stressed/threatened. Absolute shock and the like. Because. He's not really much of a screamer. I can't quite tell what he's doing when Seth dusts him, but whatever. I assume he folds in instead of out when stressed.
...mnbkjbjkabjk. THIS WAS SUPPOSED TO HAVE COHERENCE D: