Botan is a major supporting character in the anime and manga series Yu Yu Hakusho. She serves as a guide to the Spirit World and helps recently deceased souls cross over. Initially introduced as a cheerful, blue-haired 'Grim Reaper', Botan becomes a close friend and ally to Yusuke Urameshi and his team. She provides them with information, support, and transportation between worlds, adding both comic relief and emotional depth to the story.