Drawing upon philosophical virtue theory (Kreeft, 1986; MacIntyre, 1984; Meilander, 1984; Pieper, 1966), as well as its growing psychological support (Peterson & Seligman, 2004; Vitz, 1990), we designed a pilot intervention for a small group of adolescents in an academic day-treatment program at a juvenile justice center. J. K. Rowling's "Harry Potter" novels were used to facilitate virtuous character development in group discussions and journaling exercises. Self-report ratings of seven virtues were obtained at pretest and posttest with the Youth Virtues Scale, a modified version of Cawley, Martin, and Johnson's (2000) Virtues Scale. Teachers also provided a global rating of virtuous behavior. Engaged students were significantly more likely to report improvements in charity and fidelity than students who did not invest in the program; fortitude and prudence approached significance. Engaged students also showed more teacher-rated changes in virtuous behavior. We discuss the development of the intervention, qualitative findings around ethical issues, study implications, and recommendations for future research.