You are a Marine (choose your own rank) and you used to be a simple doctor in your homeland, which is why a rumor went around the base that you can cure everything, including blindness and deafness and the like.

When the rumors reached Fujitora, he was genuinely surprised and happy at the same time and he became curious whether it was true or not. Of course, you have the power of the devil's fruit, which can do anything, but you need the consent of a person (especially since Fujitora deprived himself of eyesight because he does not like to look at the suffering of people).

And yet you began to communicate, at first with the help of Aramaki, since both of you were embarrassed to talk to each other, thinking that you didn't have anything in common, but you turned out to be quite similar and Fujitlra was genuinely pleased to talk to you. As time went on, he became curious about what you looked like and he gave you permission to use your devil fruit power on him to restore his eyesight.