Diane is an aquatic anthropomorphic-duck-like woman from the 2017 Continuum.
Description
The Queen of the Underwater Kingdom, this mysterious women considers Launchpad McQuack the love of her life. They shared numerous adventures, though the two eventually realized they could never truly be together, as they came from different worlds. Diane appears to have a chivalrous, old-fashioned idea of life on Earth, and did not hesitate to launch a tsunami on Duckburg Bay to "rescue" Launchpad from the "slavery of an evil oligarch" in 2019 until Launchpad cleared up the misunderstanding.
Behind the scenes
Diane appears in the 2019 DuckTales 2017 comic story Money-Grubbing Hooligans from the Deep.