The phrase purple-dressed lady refers to an unnamed background character seen on multiple occasions wearing a full-length purple dress. She has brown hair she ties up above her head in a bun using a pink hairband and wears glasses.
In this episode when Whammer shatters a bolder WordGirl just stopped, the lady is one of three civilians shown under the shadow of the approaching projectiles. She is the only one of them who receives a close-up.
"Hey! You're only supposed to take one! Activate the free balloon alarm!!"