Character Dynamics in Sartre's No Exit

In Jean-Paul Sartre's existential play No Exit, the relationships among the characters Garcin, Inès, and Estelle illustrate profound insights into self-perception and interpersonal dynamics. Each character is trapped not only physically within the confines of hell but emotionally through their interactions with one another. Consider how their dialogues and revelations inform the audience's understanding of their shared fate and individual motivations. Which character dynamic most significantly contributes to the play's overarching theme of 'hell is other people'?