Lilja's true character

From data fragment 15 we know that Lilja is is faking her entire personality in order to get closer to koshka as a part of the pandora replication process. She acts in a way similar to koshka and picks up her interests such as wanyadora (which she hates) to have more conversation topics with her, she even makes forced meows at the end of her sentences. 

It's implied that Lilja is being spared the death penalty for the crime of accidentally killing her instructor in exchange for spying on Koshka. To be exact, being the clay girl, who is supposed to be molded into the pandora's box. Because of this her real personality and interests are forced out of her.

What kind of person is the real Lilja? There is a scene by the end of the story where she lets her true character show through. Suring a battle where lots of inexperienced gauntlet knight adepts are put on the front lines Lilja shows great concern for them and gives them advice to keep them alive. While koshka does not care and tells them to die if they want to. 

Lilja is forced to imitate koshka's character at all times, so she is forced to play a nihilistic asshole who does not care about life and she does this for most of phase 1. Which is why it's so strange for her to be this caring about people in this scene. Koshka notices this and gets upset

Chloe picks up on this change in character and asks her who is she really, Lilja completely breaks character and she even stops meowing at this point, she just speaks normally

The true Lilja is not nihilistic like Koshka, she cares about protecting others, this slip showing her true character exposes her as a spy to the rest of her team and is the reason for why she is attacked by Chloe in the final Battle

--Prophecy--

MIYAO prophesizes that Miyao will kill Lingji and Koshka who will be exploded by guided missiles, but we only saw the first part of the prophecy be fulfilled. Miyao killed Lingji, however Koshka wasn't killed by the end of phase 1. Or was she? 

First you have to ask what constitutes someone being 'Koshka', in Umineko we saw how much room for interpretation and tricks there is with human names and identity. First of all we need to establish that Koshka is not a real name but something more like a pseudonym that she has, since it's not a Russian name but the word for cat. Most people we know have a full first and last name but she does not:

• Miyao Mitake
• Gunhild Gustaffson
• Chloe Ironside
• Lilja Viljakainen

but she is just Koshka - the cat

So what does it mean to be Koshka, if you assume that idenitity = body, remember that there exists a whole stock of 4d printed Koshka body spares, that her brain is regularly switched out of. Her brain is the only unique thing that cannot be replicated, therefore koshka doesn't have to necessarily look like the koshka we saw in phase 1, if her brain is copied into a different body. She can even look like Lilja.

The Lilja we saw get shocked by Chloevil was not actually Lilja but Koshka inside Lilja's body, because Lilja as Clay girl has successfully managed to copy Koshka's brain, remember how MIYAO said that koshka will die.

She will be exploded by missiles, and that's exactly how we see Lilja die. Hit by missiles she was unable to avoid because of Chloe's electric shock. This way the entire prophecy has already been acted out in phase 1.