This single yet a comprehensive case study has well examined the emotional, behavioral and social impacts of Adverse Childhood Experiences (ACEs) on a female emerging adult (EA) aged 19 who suffered the most of ACEs in general and Childhood Sexual Abuse (CSA) in particular. This study reports the impact of abuse on her personality and mental health utilizing both structured and unstructured clinical interviews and other assessments. A thorough psychometric assessment includes the DAS scale, Beck Anxiety Inventory (BAI), Beck Depression Inventory (BDI), and Schema Mode Inventory. BAI and BDI are utilized to validate the scores on DAS scale. These investigations helped develop a diagnosis and management strategy considering her repeated deliberate self-harming behavior. The girl met diagnostic criteria for serious depression and further psychiatric assessment identified borderline personality disorder (BPD). Psychometric assessments help establish an adequately precise diagnosis and comprehend the emotional, behavioral and psychological manifestations of ACEs in later stages of life especially in the emerging adult phase (18-29). Emerging adulthood is the age where the growing adolescents come across several challenges of age transition in terms of physical, emotional and personality development. The study reveals schema-focused treatment is effective for persons with borderline personality disorder and early childhood sexual trauma.