Remembering him

What if Eren Jaegers mom didn't tell Eren about him having a twin sister? What if Eren's Titan blood was temporally and he was something else? What if Eren has been having strange dreams of this girl that's crying out for him. Will Eren accept the truth of what his family really was or will his sister be alone again for another 209 years. Eren loves Levi but is afraid to tell him until he founds out what these dreams mean and founds out what he really is.