Mushoku Tensei: Jobless Reincarnation Season 2 begins with a green-haired girl falling from the sky. In an attempt to break her fall, the girl uses every last bit of her magical power, causing her hair to turn white in the process. The girl is then renamed Fitz by the Princess of Asura, Ariel, who accepts Fitz as her royal bodyguard and gives her a pair of sunglasses to hide her distinct red eye color.
Source：https://www.cbr.com/mushoku-tensei-jobless-reincarnation-silent-fitz-facts/
