Even after Umbridge became High Inquisitor through the Ministry's Educational Decree, it did little to increase her deterrent effect among the students at Hogwarts.
In everyone's minds, she remained the bouncing Toad professor.
Because this impression was so deep-rooted, coupled with circulating photographs, students would occasionally get too excited—or rather, have a death wish—and refer to Umbridge as a pink toad.
Chapter 936