The slaying missions in "Demon Slayer: Kimetsu no Yaiba" have a profound emotional impact on Tanjiro and his comrades. Throughout their missions, they face perilous situations, witness tragic deaths of fellow demon slayers, and confront powerful demons, leading to feelings of fear, sadness, grief, determination, and sometimes guilt. Tanjiro, in particular, struggles with the weight of responsibility and the loss of loved ones, while his comrades also experience a range of emotions as they fight to protect humanity from demons. The emotional impact of these missions serves to deepen the characters' development and strengthen their bonds as they face adversity together.