In Haikyuu!!, visual metaphors are often used to depict intense emotions by incorporating dynamic animation, expressive character reactions, and symbolic imagery. For example, when a character is feeling determined or passionate, the animation may show them surrounded by a fiery aura or with their eyes shining brightly. In contrast, during moments of defeat or despair, the visuals may shift to portray the character enveloped in darkness or with a heavy weight on their shoulders. These visual cues help to convey the characters' emotions and the intensity of their feelings to the viewers effectively.