Who is Ed?

W: Let’s go in here and order some coffee while we look at your pictures.
M: Good idea. We’d both like coffee, please. Okay, here’s one of Ed’s, my roommate. I took this one right after we arrived at school this fall. We had just met, in fact. And this was our room in the dormitory while we were carrying all of our things. What a mess!
W: You certainly had a lot of boxes. How did you ever find room for everything?
M: In the beginning we thought we’d never get all arranged, but now we’re very comfortable. Lucky for me, Ed keeps his things neat.
W: Do you like living in the dormitory?
M: It’s not bad. Sometimes Ed turns his radio up too loud or makes too much noise, then I get angry. Sometimes I leave my books and clothes lying around and he gets angry. But usually we get along. Here’s a picture of him taken when we went to visit my family during vacation.
W: And this last one?
M: That’s my dog, Spot.