Dani (Florence Pugh) is the emotional core of the film. At the beginning of Midsommar, she is reeling from a loosing her parents and sister in a murder-suicide. Over the course of the film, she struggles with her emotional isolation and the inability to connect with her distant boyfriend Christian or his friends. Dani’s vulnerability and emotional instability make her both a sympathetic figure and a character who is profoundly affected by the bizarre and disturbing events that unfold at the Swedish commune. Throughout the film, her journey moves from deep sorrow to a complicated, almost cathartic involvement with the cult as she finds a twisted sense of belonging in the midst of her pain.
Christian (Jack Reynor) is a graduate student studying anthropology, which brings him to Sweden with his friends to observe the midsummer festival. Though well-meaning, he is emotionally distant, self-centered, and increasingly uncomfortable with the situation in the commune. His relationship with Dani is strained, and he is unable to handle her grief or provide the support she needs. Over the course of the film, Christian is caught between his desire to distance himself from Dani's trauma and his sense of obligation, which ultimately leads him to make questionable decisions. His journey in the story is one of passive complicity and growing disintegration, as his detachment makes him susceptible to the influence of the Swedish cult.
Mark (Will Poulter) serves as the comic relief in the group, but his behavior is often inconsiderate and insensitive. He’s brash, selfish, and is often the least concerned with the moral or ethical implications of their trip. Mark tends to act without thinking and frequently makes inappropriate comments, especially about the local customs and people. His lack of empathy and impulsive nature make him a target for the cult's manipulations, and his fate serves as a stark contrast to the more sympathetic characters. Mark’s disregard for the cult’s rituals and his own boundaries contribute to his eventual downfall.
Josh (William Jackson Harper) is a serious, intellectual graduate student studying anthropology with Christian. He has a keen interest in studying the commune’s customs for his thesis on European midsummer celebrations. Josh is initially skeptical about the commune's traditions, but he becomes increasingly curious about its rituals, particularly when it comes to the group's ancient texts and sacred ceremonies. His pursuit of knowledge leads him to cross the commune's boundaries and ultimately places him in grave danger. Josh is one of the more grounded characters in the group, but his academic ambition blinds him to the growing danger around him.
Pelle (Vilhelm Blomgren) is the one who invites Christian and his friends to the commune for the midsummer festival. He is an enigmatic and friendly guy whose charm and warmth stand in stark contrast to the dark reality of the cult. Pelle comes from the commune and seems to have an emotional connection to the group’s rituals. Throughout the film, he remains to be a calm, welcoming presence, though it is hinted that his involvement in the community is more calculated. Pelle is key to the film’s psychological tension, as he subtly manipulates Christian and his friends, especially Dani, into becoming further enmeshed in the commune’s beliefs and practices. His ultimate motivations are revealed to be part of a larger, sinister plan.
The Hårga is a secluded, pagan cult in Midsommar whose members are deeply devoted to ancient rituals centered around life, death, and rebirth. They live by strict communal values where individualism is suppressed in favor of collective harmony and survival. Their beliefs are rooted in fertility and renewal, with ritual sacrifices seen as essential to maintaining the balance of the earth and ensuring the community’s prosperity. While the Hårga initially present themselves as welcoming and peaceful to outsiders, their true nature is revealed throughout the film. The cult’s blend of warmth and cruelty, perverse sense of justice, and generational loyalty make them a fascinating antagonist, representing the dangers of blind devotion and the erosion of personal autonomy within a totalitarian, communal system.