Yeah, that scene, except one of the times I watched it, Ein spoke something first. Probably nothing new or of importance to anyone, I think he just asked Helena a question first, maybe about himself... but I think at least if Ein said something first that scene wouldn't seem as random (Helena just bringing up Epsilon out of nowhere)... but then most of the scenes in DOA2 seem random anyways, lol.
And the reason I was replaying the Ein's story mode so much was because I was trying to unlock everyone's costumes by their first methods, and one of everyone's costumes requires beating story mode on normal settings and no continues. Seeing the scene for the 7th time, I partially zoned out... lol
If that line was there, I have to wonder if that would happen with any of the other scenes in the game...
it's funny cause I'm currently playing DOA2 Millennium edition and I have a vague memory of something like this happening, can't put my finger on it exactly though, but i'll keep a look out