Flashback

"On this particular afternoon I'm now thinking of, we were standing up on stools and benches, crowding around the high windows." p.7

Ishiguro in this case, uses a flashback to help characterize Kathy a little bit. Within the 1st paragraph of the chapter, Ishiguro reveals the essentials of Kathy: age and job. Although her job as "carer" isn't quite clear, she explains in great length that she is good at her job and his relatively advanced in it. She gets to pick her donors and became close to Ruth and Tommy again through picking them. She tells of her connection and time at this school Hailsham she speaks fondly of. I'm not quite sure if it's the school or more the people that she has great memories of. Kathy stood by and watched Tommy get fooled so it doesn't seem to me that she is a good friend of his at least at this point of the novel. Also, I noticed that the boys knew Tommy had a short fuse and tricked him so this could come into play later.