User blog comment:SethRollinsBabyFace/Who do you think It's Final Boss?/@comment-10534118-20160319041706

Though not final boss material, Adramelek 100% power might definitely be a semi-final boss. We'll likely see her be recreated and go higher in power throughout the 4th-7th Tartarus portals. Showing more forms and having more scenes. Might even be after 100% when she can be recruited. Might be using sealing as an excuse to start at 10%, leveling her up back to 100% power. Might even see a large number of requests since she shuffles through so many forms.

As for big Final Boss, 2 possible ideas;

1.) Some entirely new Alpha Apopostis; The sort of hive-mind that they could follow. What assimilates females into these creatures and what duplicates them. It might consider the numerous time-lines so far out of whack that it's best course of action is going berserk and wanting to consume/assimilate it ala Final Black Alice form.

2.) Ilias OR Alice I depending on your beginning choice and future alliance choices. Let me explain;

-In Part one, you choose between Ilias and Alice XVI. The choice impacting areas and dialogue throughout the 1st part.

-Later in Witch Hunt, you choose between Lily and Lucia.

-It was shown that a war between a Monster Navy and Monster Pirates will exist at some point. Where you can side with adorable navy fish girls or the adorable mermaid pirate.

Paradox's biggest replay factor here seems to be side choosing. Meaning, possibly in part 3, Great War might happen again and it'll be Angels or Monsters. The final boss being whatever you're against.