How Old Is Kakashi Hatake in Re Zero

Let's address the most crucial question right away for fans looking for answers: Kakashi Hatake, the renowned Copy Ninja, is not a character in Re Zero - Starting Life in Another World. He hails exclusively from Masashi Kishimoto's iconic Naruto and Boruto: Naruto Next Generations universes. While character crossovers are popular in fan fiction, canonically, Kakashi does not exist within the world of Emilia, Subaru, and the Witch of Envy....