Who is Arthur?

Arthur found himself in his old apartment which was a luxurious apartment.

"Why am I here, I thought I was in the ruin, is this even real" He contemplated.

Arthur wasn't fond of his old apartment because it left a scar, he could never forget

He strolled from the living room and went upstairs, to take a look at his old room, before he could reach there he heard a sound coming from his room, and immediately his mind triggered him back to his memories. Memories of everything that had happened in his childhood, flooded his thought.

"This can't be my memories maybe this is just a dream I'm having", He tried to clarify his doubt.