The film poster designer created contrast between the main characters by editing their features, such as turning one character's iris red and adding red and white glows. For the title, the designer used a chosen font with effects to create professionalism and uniqueness, placing a red glow behind to match the main image. Production details were listed in different sized fonts as seen on existing products. The initial tagline used the number "2" to represent the two characters, but it did not clearly hint at the plot twist, so it was changed to "too".