Yes, Caterina and Tres join the Rosenkreuz orden, because Cath had a terminal disease and the AX was dissolved (after
Alessandro died, I think.) She decided she would destroy the order from the inside, and played mind games with Dietrich,
lol.
Seth was born in Canada, I believe? Not America.
Cain was supposedly very meek and kind in the beginning. He wanted revenge against the humans, but he was too
weak-willed to do anything about it, so he fused himself with krusnik, thinking it would make him stronger. Instead, it
just took him over. =P
Interesting point: Seth was the one who first found the krusnik. However, Cain fused himself with it first, then Abel
soon after and then Seth. Lilith refused to fuse herself with the krusnik, but after all three siblings turned on her,
she had no choice but to do it in order to fight back. All of them can activate it 100%, but there is a chance that the
crusnik can take over them (the more they activate, the higher that chance is.) That's why we always see Abel doing
that cheesy 40%...80% thing. He just doesn't want to lose himself. Cain, of course, doesn't care, since
he's 100% fused anyways, and his old self is long gone. I don't know how much Seth releases when she ativates,
but it's less than 100%, since she's only done that once when she fought Cain over the ark, and when she did,
she had dragonfly wings. (untold stories.)
Cain wants to crash the ark onto Earth and end all life.... I have a feeling this is the remnants of his old self at
work. To destroy everything, including the krusniks, would make him happy and put his mind at ease. I don't think
there needs to be another krusnik on board to control the ark, but instead, just someone with good technical expertise
to control the systems on board. Either Dietrich or Isaak would work. Seth is watching over the ark, and she hid the ark
in Albion, while the control programs are in her Empire. One is useless without the other.
The furthest that Trinity Blood Canon untold stories got was that Cain got a hold of the ark and tried to crash it, but
Seth sacrificed herself to stop it. She stopped it with all her strength, but she had no more fighting energy after
that, and Cain ripped her head off. Abel came to save his sister, discovering her dead, and there's an epic
Cain/Abel battle. Both of them got severly injured and must recover over several decades. During this time, The
Rosenkreuz orden took over most of the occupied world, including the Vatican. Caterina joined RCO, Alessandro died, and
most likely, Francesco died, as well. Now, the only nation that is not allied to the Rosenkreuz is Albion, led by
Esther.
Basically, after the author died, his notes ended at Abel and Cain out of action, and war brewing between Albion and the
rest of the world. All this info is from tedious research through forums, websites, scans, and Chinese sources. *lol* :D