Goldie O'Gilt is a supporting character in the 2017 version of DuckTales. She is Scrooge's love interest and one of his current rivals. A self styled con-artist, she's also an adventurer like he is, though with fewer scruples. She is voiced by Allison Janney.
Goldie is an overall selfish person who is always scheming so that she and she alone gets whatever treasure she's after. That said though she is never cruel or spiteful and would never actually let someone be harmed during her scheme. Likewise, she saved Scrooge from the falling rock fissures, and then from one of Glomgold's death traps, and is quite appalled when Doofus uses Louie as a piñata for Boyd to whack.