We investigated person (sex, aggression level), context (witness type, victim reactions), and person x context effects on children's anticipated moral emotions following hypothetical acts of aggression against a peer. Children (N = 378, mean age = 11.3 years) were presented a series of hypothetical vignettes in which the presence of witnesses (no witnesses/most liked classmates/all of the class) and victim's reactions (neutral/sad/angry) were manipulated. The results indicated several person effects (e.g., girls anticipated more guilt and shame but less pride than boys; aggressiveness was related to less guilt and shame), as well as context effects (e.g., anticipated shame depended on who witnessed the situation and the emotional reactions of the victim). However, person context effects predominated. The overall pattern of results indicated that girls and low-aggressive children were more sensitive to contextual cues than boys and high-aggressive children. The findings support the importance of a person x context approach to understanding the emotional reactions of different children in different situations.