Sexual harassment towards women in esports is a gendered form of toxic behaviour that may negatively affect women’s well-being and participation in online gaming. However, less is known about how individual differences are related to sexual harassment towards women in esports. The present study examined whether agreeableness was negatively related to sexual harassment, whether this relationship was mediated by sexism beliefs and whether gender moderated the relationship between sexism beliefs and sexual harassment and the indirect effect. A cross-sectional self-report survey was conducted among competitive online gamers who used team communication. The final sample consisted of 86 participants. 

Results showed that agreeableness was significantly negatively related to sexual harassment. In addition, sexism beliefs significantly mediated this relationship, suggesting that participants with higher agreeableness reported lower sexism beliefs, which in turn were associated with less sexual harassment behaviour. However, gender did not significantly moderate the relationship between sexism beliefs and sexual harassment or the indirect effect. These findings suggest that sexual harassment towards women in esports can be understood through both individual differences and belief-based mechanisms, with sexism beliefs representing a potentially relevant target for intervention.