Dorothy naturally didn't know what the cool, somewhat aloof secretary was really thinking as she led the way.
She just watched Miss Ghost Mask's peachy behind sway with her steps, marveling at how the Judgment Court truly deserved its reputation as an elite department, considering that even a secretary, who seemed to be responsible for clerical work, was so incredibly skilled.
Really, she almost failed to notice the secretary sneaking up behind her. Luckily, Miss Ghost Mask ultimately chose the wrong Stealth Spell. Of all the spells, she had to use the Witch's Akarin Technique to erase her presence.
Heh, playing with witch-related spells in front of the Witch of the Forest herself was like brandishing a broadsword before Guan Yu; therefore, Dorothy eventually detected the familiar spell fluctuations and saw through Miss Ghost Mask's trace.
But, if Miss Ghost Mask had used a different Stealth Spell, Dorothy reckoned she would have been utterly blind to it.