Ace is a brave, independent and eagerly ambitious Crescent Wrenchtool who doesn't like being told what to do, which puts her at odds with Waldo. At one point in her life, she was part of a group of others of her kind called the Reckless Wrenchtools and was friends of sorts with an Ankylodump called Grinder before he was severely damaged by a fierce sandstorm, which jammed his gears before Scraptors attacked him, but despite his other friends getting him to a waterfall, his speed was limited from then on. She likes teasing Click-Clack, building stuff and riding on Ton-Ton, and was once also said by Revvit to be skilled in treating the deadly bites of Shockarachnids.