He thought nobody could see him, until she came along and heard his voice, saw his face.
Everyone thought she was mad because she was found talking to herself.
But in reality,
There was more to see beyond the two entities.
Kim heard his name being called twice before he managed to force his eyes to open.
"What... Happened, Sonic?"
"I don't know, All I know is that one second we were getting out of the club and the next nothing, till I woke up in this warehouse, I tried to open the door or scream for help but no one came..."