Derived from the wiki:

"Brightney is one clever lamp, always coming up with bright ideas! She teaches children on how to think up solutions to their everyday problems!"

 Brightney is a smart and helpful toon. She is skilled at solving problems, as well as helping Toons out. However, it's likely that she may be overworked at times.

Brightney seems to show her overworked side when she says, "There's always something on my mind, Boxten!", and "Always have to be three steps ahead of those Twisteds!".  Despite this, she's always ready to help with whatever her fellow Toons ask of her, showing her personality as a hardworking, yet friendly toon.

Her voice is similar to Bobette's, but deeper. A confident female voice with a slight raspiness to it.