In "We Need to Talk About Kevin," Kevin, the protagonist's son, exhibits traits associated with Antisocial Personality Disorder (ASPD). Throughout the film, he demonstrates a lack of empathy, manipulative behavior, and a propensity for violence, culminating in a tragic school shooting. The film explores the complexities of his character and his relationship with his mother, Eva, highlighting the psychological and emotional challenges they face. Kevin's behavior raises questions about nature versus nurture and the difficulties in understanding and addressing mental illness.

"We Need to Talk About Kevin" explores the complex relationship between a mother, Eva, and her son, Kevin, who commits a horrific act of violence. The film delves into themes of nature versus nurture, motherhood, and the struggles of parental responsibility. It raises questions about the impact of upbringing on a child's psyche and examines guilt, societal judgment, and the search for understanding in the aftermath of trauma. Through its nonlinear narrative, the film effectively portrays Eva's emotional turmoil and the haunting consequences of Kevin's actions.

In "We Need to Talk About Kevin," Celia's eye injury occurs when Kevin's actions result in a violent incident. During a confrontation, Kevin purposefully causes Celia to get hurt, leading to her needing stitches on her eye. This incident highlights Kevin's disturbing behavior and the escalating tension within the family. Celia's injury serves as a significant plot point, illustrating the consequences of Kevin's increasingly malevolent actions and the impact they have on those around him.

In "We Need to Talk About Kevin," the twist revolves around the ominous and gradual revelation of Kevin's true nature. Throughout the film, it becomes clear that Kevin, portrayed as a troubled and manipulative child, exhibits violent tendencies and a lack of empathy. The twist culminates in the shocking revelation of his actions in a school massacre, which devastates his mother, Eva. The film explores themes of motherhood, guilt, and the complexities of nature versus nurture, leaving viewers to grapple with the implications of Kevin's behavior and Eva's struggles.