The Troub-Bubble is a female anthropomorphic heron in the 2017 Continuum
Description
A chemist-turned-supervillainess, Black Heron became a F.O.W.L. agent and built herself a high-tech base on an uncharted island, complete with miscellaneous robot guards and booby-traps.
At some point in the 1960's, the stole an alchemical formula for Gummiberry Juice from an auction sale, planning to use it to create an army of invincible bouncing soldiers. Then-S.H.U.S.H. agents Scrooge McDuck and Bentina Beakley then came to the island to get it back and stop her evil scheme. In the ensuing battle, the only copy of the formula and Heron's batch of juice were destroyed, leaving hypermnesic Bentina Beakley as the only person on Earth who knew the formula. A fire was started in the battle, and, while McDuck and Beakley escaped unscathed, Heron's lair was destroyed and she lost her right arm in the explosion.
For decades, an increasingly-unhinged Heron schemed for revenge, slowly rebuilding her lair and creating a cyborg arm for herself. Finally, in 2018, taking advantage of a temporary weakness in the security of McDuck Manor, Black Heron kidnapped Beakley and brought her back to the lair, intent on getting the formula out of her and then murdering her. Beakley however was rescued by her granddaughter Webbigail and a still-sprightly Scrooge McDuck; once again a fight broke out, and Black Heron ended up falling to her death into the sea, with only her detached robotic arm left behind.
Behind the scenes
Black Heron is the main antagonist of the 2018 DuckTales 2017 episode From the Confidential Casefiles of Agent 22.
Black Heron (who has no known counterpart in the Prime Universe) is a pastiche of James Bond villains, complete with a "cool-looking" island lair. Her robot arm is comparable to that of the henchman Tee-Hee from the James Bond film Live and Let Die, though it is much more technologically advanced and polyvalent, bearing significant similarities to John Silver's arm in Treasure Planet.