Kakashi Hatake's face without his mask was revealed in the anime Naruto: Shippuden filler episodes and also shown in the game Naruto X Boruto Ultimate Ninja Storm Connections. He is depicted as a handsome character with a calm expression. The reason Kakashi wears a mask, based on various sources including creator insights, is to maintain an aura of mystery as ninjas are secretive. Additionally, it was said he started wearing the mask from a young age and for a long time, partly to hide shame related to his father's reputation and partly as a humorous reason about hiding his nosebleeds during perverted moments. His face remained hidden throughout most of the series, making it a long-standing mystery until these reveals in supplementary content.
The revealed face shows Kakashi with short spiky silver hair, a visible scar over his left eye, and a calm demeanor that fans appreciated after the long mystery. Various fan arts also portray him without the mask, but the official reveals are from the anime filler and game cutscenes.
In summary, Kakashi without the mask is officially shown in Naruto: Shippuden filler episodes and in the Naruto X Boruto game, with his face being handsome and calm, and the mask being part of his character design rooted in mystery and some in-universe explanations.
