Complex sentence: Having merged with another angel, Adam, Gendo will become a god if he merges with Lilith; however, Rei rejects Gendo, absorbs Adam and reunites with Lilith, and her body grows to gargantuan size.
Split into simpler sentences: Having merged with another angel, Adam, Gendo will become a god if he merges with Lilith. However, Rei rejects Gendo, absorbs Adam and reunites with Lilith, and her body grows to gargantuan size.