Beelzebub
This demon statue had glowing red eyes.
The statue also had giant wings sprouting from its back as if it could fly at any moment. As if it had claimed the entire sky as its domain.
There were a bunch of smaller demon statues that sort of looked like him. He was surrounded by them as if he were their head.
The large demon statue was extremely intimidating. It radiated a strong sense of fear, hunger, and reverence. But for some reason, Eren felt an extreme familiarity with the presence it was radiating.
He also started understanding what the whispers were trying to say to him subconsciously. They were telling him the name of the entity the statue represented.
Being a Demon Prince, this entity had proved his mettle against so many of the demons and rose above them. He had traveled to different worlds and made a name for himself. He had many names and several titles. All of them spoke volumes about his domain and his achievements.