Cinnamon is a Superspy Psychic who helps John D.Rockerduck to win a bet which he made with Scrooge McDuck on who is Duckburg's biggest Philanthropist. She hypnotises Gladstone Gander who is named now Agent X so Rockerduck can have his Luck on his side and with it win the bet. Gladstone is well known about his unpredictable and unmaginable luck, so John D. Rockerduck is more than sure that he will win the bet, but Cinnamon has other plans as we see at the 3rd issue of Ducktales and since her powers grow she says that soon she won't have any need of Rockerduck. She also appears in the Duck Tales/Darkwing Duck Crossover story Dangerous Currency where she is a member of the League of Eve-il along with Magica De Spell, Ammonia Pine, and Camille Chameleon. They are in an alliance with The Phantom Blot, The Fearsome Four, and The Beagle Boys. They are also later joined by Nega Duck.
The power which she has and have we seen up until now is hypnosis which more powerful by time. She can easily hypnotize anyone who looks at her eyes, without any resistance. At first see could hypnotize only one person, but now with only one look she can hypnotize two people or maybe more, as we learn at the story Heavy hangs the head. She maybe also be a telepath since she can make people forget what they saw and listened.