Since the wiki hasn't official begun the separation of articles based on adaptation, I've deleted the Eren Yeager (Lost Girls) article and moved it to your sandbox as "User:Ethan Harmicar123/Eren Yeager (Lost Girls)". All the old information is still there, so you can still make whatever updates you feel are necessary.
That's only because those characters are exclusive to the Lost Girls stories with no canon counterparts. Since the Eren, Mikasa, Grisha, etc. that appear in Lost Girls are intended to be the same characters that we see in the main manga, their Lost Girls material can go in Other Media, as opposed to Junior High or Chibi Theater variants that are intended to exist in parody worlds.