Yes, because Diarmuid is the big brother. It is why he feels so bad about becoming distracted.

"I don't know. My brother thought they were, but I'm not sure. He thought they were the ones who caused the fire, but I don't think he realized that it was me not watching our food that did it," Diarmuid shakes his head. "I guess the shadows are just something to watch out for and see if they show up again."