(Series of novels by Osamu Makino)
Delores was a high school cheerleader in Raccoon City.
She was the most beautiful female student at the school, and chose Jason to be her boyfriend. One night, she went over to Jason's house to spend the night there on a date, as the latter's parents were out of town. The morning after, however, as Jason was preparing toast for her, he ended up taking too long. She then got angry and was about to tell him off, only to encounter a zombie in the kitchen (implied to be Jason) and ended up devoured by it, a sign of the overall disaster that befell the town during this time.