“scared of Sister Snowflake”
When I was a kid, there were no “Sister Snowflakes”... but we did have a Sister Domitilla and we were scared to death of her! :)
There was probably a good reason for being scared of Sister Domitilla...
As for Sister Snowflake, I can’t imagine why Father (or His Excellence) is scared of her. Except that being a good feminist flake, she probably has the press on her side, and if there’s one thing Father (and His Excellence) are scared of, it’s the press.