As demand grows, Relational Personal Intelligent Agents (RPIAs) have increasingly become valuable assets, benefiting both users and companies through mutual value creation over time. Despite their advantages, trust violations are inevitable, necessitating design measures to preserve user trust resilience. Given the benefits of integrating humor in agents, this study investigates the relationship between humor in RPIAs and trust resilience. Assuming support of the hypotheses, this could guide designers to employ humor when designing their RPIA and provide a basis for other researchers to extend theories originally formulated for human-human interactions to human-relational agent relationships.