She was 'fanatically' devoted to her job.
a religious 'fanatic' [='extremist']
He is 'fanatical about' boating.
(..) There must be something he... Let me talk to him on your behalf. The king cannot sully himself negotiating with an unwashed fanatic. You will try to help her? I'll do everything I can to win her freedom and her brother's. Your happiness is all I want in this world. (..)2015 TvShow: Game of Thrones Title: The Gift Season: 5 Episode 7