Garbage Doll

He has no name and but narrates the situation in the illusionary world seen through Tomoya's dream while referring to himself only as, "Me." He has his body created by the girl out of garbage so that he can be with her. The body is about half the girl's height. He can't talk as he is created without a mouth, so relies on body language to communicate with the girl. Unlike most characters in the series, he is created via CGI.

Wikipedia