Adam was The Father of Humanity, the first and original man created in the image and likeness of a God. He is the man of File No.00000000001 and was referred to as the "Hope of Humanity".

He fought to the death against Zeus in the second round of Ragnarok, losing his life in the process on behalf of his children, humanity.

(Source: Shuumatsu no Valkyrie: Record of Ragnarok Wiki)