Introduction: Psychiatric nursing involves complex emotional, behavioral, and ethical challenges. In addition to theoretical knowledge and clinical skills, master’s students in psychiatric nursing require personal capacities to establish therapeutic relationships, provide safe care, and manage highly stressful circumstances. Although numerous studies have examined nurses’ personality traits, burnout, and professional competence, limited qualitative evidence is available regarding the personal capacities of master’s students in psychiatric nursing from the perspective of mental health team members. This study aimed to elucidate the personal capacities that contribute to the professional readiness and development of master’s students in psychiatric nursing. Methods: This qualitative study was conducted using a conventional content analysis approach between October 2019 and July 2020. Participants included master’s students and faculty members in psychiatric nursing, psychiatric nurses, psychologists, and psychiatrists with experience working in psychiatric settings. Purposive sampling with maximum variation was used, and 21 participants were recruited. Data were collected through individual semi-structured interviews and analyzed using the Graneheim and Lundman method. To enhance the trustworthiness of the findings, Lincoln and Guba’s criteria were applied. Results: Three main categories emerged from the data analysis: “self-awareness and personal regulation,” “ethical sensitivity and professional accountability,” and “physical and psychological preparedness and environmental vigilance for safe care.” These categories indicated that the personal capacities required for readiness in psychiatric nursing encompasses self-knowledge and self-acceptance, emotional regulation and response management, developmental experiences and social support resources, respect for patients’ rights and professional responsibility, empathic and nonjudgmental communication, physical capabilities and environmental awareness for safe care, mental health, resilience, and sustained performance. Conclusion: Students’ readiness for psychiatric nursing is not limited to theoretical knowledge and technical skills; rather, it is shaped by a set of capacities that facilitate learning and professional performance. Postgraduate programs in psychiatric nursing can enhance students’ preparedness to provide safe, ethical, and person-centered care by integrating education in therapeutic communication, self-awareness, stress management, clinical ethics, and psychological support. Further research is recommended to examine the development of these capacities among students and to evaluate the effectiveness of educational interventions designed to strengthen them.