Tougher than the toughies, smarter than the smarties, and sharper than the sharpies, Scrooge made his money fair and square. Part mysterious trillionaire, part adventurer, his wealth combined with his overwhelming confidence has bred an unpredictable nature and a belief that anything can happen & everything is possible if you're willing to work for it. His love of money isn't because he's greedy, it's because he knows how he earned each dollar; each coin is a memento of a past adventure.
Once an avid adventurer, Scrooge started to slow down and began spending more time back at home, until his nephews rekindled his desire for adventure. Scrooge values hard work and integrity and continues to be a hard worker in his old age. He wishes to instill values of hard work and dedication to his great-nephews, as seen in "The Great Dime Chase!".
Stern, yet kind-hearted, Scrooge takes great care in mapping out his paths, using the knowledge he has gained over the years to keep himself safe and out of harm's way. He is happy to impart his knowledge to others, provided that they are willing to listen.
Before Della's disappearance, Scrooge was shown to be a more jovial, fun-loving and generous duck who relished in adventure and helped those in need whenever he could, but after her vanishing, he was shown to be much more bitter and rather jaded.
Like his nephew Donald, Scrooge can also be quick-tempered, (but not as a strong temper as his nephew) especially where his pilot, Launchpad is concerned. His rival, Flintheart Glomgold also brings out his temper, though in a different way. Scrooge is determined not to let Flintheart ever take his position of richest duck in the world.
Scrooge is shown to have an obsessive side, such as when he wanted to stop at nothing to climb Mount Neverrest, even putting the childrens' lives at risk to further his goal. Nevertheless, Scrooge will ultimately put the safety of others above his selfish desires. Indeed, his greatest shame is his failure to save his niece Della from her ill-fated space voyage.
Scrooge is also very self-righteous; carrying great pride in the experience and capabilities that made him the legend he is today. He often states who he is to assert dominance or going into a challenge knowing he will achieve, this shows he has put himself on a mantle. However, he also feels that it's only right to share the stories and experiences of his past with his family, as just like what Djinn had explained to him, it can be used as the start of great legends to come for his family's descendants.
Longevity: Since Scrooge used magical Druid Stones during Castle McDuck's reconstruction, those who were exposed to the magical properties of the stones over many years gained near-immortality, in the sense they don't age.
Skilled hand-to-hand combatant: Scrooge McDuck is a very strong duck physically, and is a master combatant. With his raw strength, he was able to defeat a Rock Giant. His strength and endurance makes him the only person able to dive and swim in gold coins (a skill later learned by his grand-nephew Louie Duck).
Genius-level intellect: Self-described as being "smarter than the smarties", Scrooge has proven himself to be extremely intelligent on numerous occasions, from his business sense to his knowledge over ancient history.
Multilingualism: Scrooge has proven himself to be an adequate translator, able to read ancient languages such as Atlantean and the unknown language of Montemplumage's City.
Scrooge has many useful talents and skills, such as farming, treasure hunting, and prospecting.
Donald is Scrooge McDuck's hothead nephew from his youngest sister Hortense. About 10 years before the events of Woo-oo!, Donald went on many adventures with Scrooge, alongside with his twin sister Della. But after Della disappeared with the Spear of Selene, Donald and Scrooge haven't talked to each other since then. Donald had never told Huey, Dewey, and Louie about Scrooge being their uncle. When Glomgold used Donald against Scrooge; to threaten his life to get the treasure of Atlantis Scrooge back down showing that he still cares. After Donald's home was destroyed, he is willing to move in with Scrooge and allows Huey, Dewey, and Louie to continue to go on adventures with Scrooge. He and Donald mostly have a love-hate relationship. Later, when arranging for Donald's month-long cruise in the Caribbean, Scrooge sets a party hat to wish his nephew well.
Della is Scrooge's niece from his youngest sister Hortense, they went on many adventures together alongside her twin brother Donald. They were very close as he saw a lot of himself in her; with her fiery spirit and adventurous attitude, unlike his nephew Donald. Although sometime over 10 years before the events of Woo-oo! she has mysteriously vanished and ever since then he has avoided Della's brother and children up but until the events of Woo-oo!. The disappearance of Della came as an emotional blow to Scrooge.
When Della returned home after 10-11 years, Scrooge welcomed her warmly. He reminds her of much changes that transpired since Della was last in Duckburg. Scrooge also tries to keep his niece from serious danger.
Upon meeting his great-nephews Scrooge thought they were ordinary kids but then saw their potential. With Huey, Scrooge is very impressed by how smart and ambitious he is, this is very well shown in The Impossible Summit of Mt. Neverrest! where they were both very determined to reach the top of the Mountain. And with the difficulty of Scrooge's stubbornness, Huey eventually gets through to him, which causes Scrooge to respects Huey's maturity and common sense.
During the events of Woo-oo Scrooge had a hard time remembering Dewey's name which frustrates him, which made Dewey desperate in trying to impress Scrooge but with his mischief, Scrooge only saw him as ignorant, impulsive and reckless. Though when he figured out how to escape Scrooge's opinion of him change to quick-witted and ambitious, and remembered his name. But it isn't to say he no longer saw him in the negative characteristics, as later in the season in The Last Crash of the Sunchaser, Scrooge saw nothing but ignorance and recklessness in Dewey all throughout the episode while they were stuck on the peak of a mountain.
Scrooge loves his nephews yet with Louie, Scrooge has shown to be a bit short with him which is shown in the episode The Great Dime Chase! Scrooge is shown to be annoyed by Louie's lazy and spoiled attitude, that it made Scrooge want to teach him that hard honest work is the most rewarding. But in The Most Dangerous Game...Night!, he is shown to have been impressed with Louie's capabilities of strategizing and seeing through every detail in order to come out with the best outcome possible, something which made Scrooge see a lot of his mother's personality in him, and even encouraged Louie to start up his own business plans.
Mrs. Beakley is Scrooge's no-nonsense house keeper, bodyguard, and closest confidant. She takes her job seriously and professionally yet as his employee she is very honest and straight-forward. She often calls Scrooge out, she's the only person he really trusts. Though is still polite and respectful, and looks out for him and his well being. The two of them met in the 1960s, when they were both agents for the spy organization S.H.U.S.H.
Launchpad is Scrooge's driver to his many automoblies, while Scrooge can be annoyed by Launchpads dim-witted nature and clumsy antics he appreciates his loyalty, kindness, and helpful nature. Scrooge states that the reason he hasn't fired him is because Launchpad is one of they few people he knows who is as crazy as he is.
Flintheart is the world second richest businessman in the world and Scrooge archenemy, because of Glomgold many failed attempts to out do him and kill him.
In The Ballad of Duke Baloney!, it is revealed that Glomgold started his rivalry because Scrooge gave him a dime for a shoeshine job.
Goldie is Scrooge's underhanded ex-partner and on again-off again girlfriend. While they are very flirtatious with each other, they often trick one another with Goldie being much more selfish and mischievous of the two. She does however still seem to show a soft spot for Scrooge, as seen at the end of The Golden Lagoon of White Agony Plains! when she chooses to leave Scrooge a clue to her next adventure inside his top hat.
Magica is one of the most dangerous adversaries Scrooge has ever faced. Years ago, she tried to use the Lunar Eclipse on Mt. Vesuvius to seal Scrooge inside his own Number One Dime, but he backfired it on her. In the present, Magica has escaped the dime's confines. Magica then forces Scrooge to watch as she begins to obliterate Duckburg to put him through his darkest hour. When the family turns the tide and free Scrooge, Magica vows to return.