Katō Dan is a child with light blue hair mentioned by Kozō to Senju Tobirama. He has a gentle appearance and is capable of using the Spiritualization Technique, which allows him to see souls. Kozō claims that Dan can see souls and predicts he will be important. Tobirama suspects that Dan might be connected to Tsunade's future. Katō Dan is a young civilian ninja who later becomes a jonin serving in Konoha's forces. He is not present physically in the main events but is referenced as a key individual.
