God

A God in Seraph of the End is referred to in passing in the figure of speech sense and referred to as if an entity by characters.

Personality
According to Shikama Doji, a being who is unsympathetic to the suffering of humans and has been murdering a great number of them over years, god has a much more twisted personality than him.

Story
At Nagoya airport where Mirai Kimizuki is controlled by the The Fifth Trumpet who has brought Abaddon to the world, Kureto Hīragi comments that even if god himself is their enemy then humanity will prevail.

After Kureto answers that Tenri Hīragi called him an old god, a god is stated by Shikama Doji to have a much more twisted personality than him.