Although Umbridge was not a Death Eater, and had no direct contact with Lord Voldemort, she showed that she was fairly in line with their goals. This was due to Umbridge's callous nature and her prejudiced beliefs, both of which were similar to Death Eater behavior.
Well, in Umbridge's case, while she may have been working for the bad guys of bureaucracy, she was never under Voldemort's thumb. She was allied with the Death Eaters and definitely enabled them, she was never an official part of the organization.
Umbridge is the secondary antagonist of the fifth novel, Harry Potter and the Order of the Phoenix, where she has been stationed at Hogwarts by the Ministry of Magic to take power away from Harry Potter and Albus Dumbledore, who have both been informing the Wizarding World of Lord Voldemort's return.
In turn, Umbridge acts in the open, from a position of power, being the Minister of Magic's right hand. She's not a Death Eater masquerading as a government official — she's just an awful person taking advantage of being in a top position.
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Why was Umbridge so nasty?
Apparently, Umbridge's mother was a Muggle and her brother was a Squib – a source of huge embarrassment for the family. Perhaps their abandonment and retreat back into the Muggle world had such a huge impact on Umbridge that it became the catalyst for her Muggleborn-targeted cruelty later on in life.
With the fall of Lord Voldemort, Dolores Umbridge was put on trial for her enthusiastic co-operation with his regime, and convicted of the torture, imprisonment and deaths of several people (some of the innocent Muggle-borns she sentenced to Azkaban did not survive their ordeal).
Why did Harry's scar hurt when Umbridge touched him?
J. K. Rowling stated that the pain from Harry's scar on his forehead was caused by the piece of Voldemort's soul trying to leave his body through the wound it entered to rejoin its master's soul.
If you have only seen the films, you might be surprised to hear that it wasn't Cho Chang who betrayed Dumbledore's Army to Professor Umbridge – it was Marietta Edgecombe. A friend of Cho's and a fellow Ravenclaw, Marietta (reluctantly) joined the DA.
What happened to Umbridge when the Centaurs took her?
Umbridge was ultimately rescued by Dumbledore, although she was apparently left with a significant fear of centaurs afterwards, reacting violently at even the sound of hoof-beats.
Let's look at the evidence. So Umbridge acquires the locket as a bribe from Mundungus Fletcher, and though it once belonged to Salazar Slytherin, Merope Gaunt, and Hepzibah Smith, Umbridge is unaware that the locket is one of Lord Vodemort's Horcruxes - or that it belonged to him at all.
Dolores Umbridge, in her position as the Head of this department, enjoyed her newfound authority and sadistically tormented the many Muggle-borns; she assigned many of her subordinates to produce anti-Muggle pamphlets in an autonomous manner, and seemed rather unpopular due to her tyrannical and sadistic manner.
This is what makes Umbridge's evil more sinister than Voldemort's; it is far more real, much like that which Kesey depicts through Nurse Ratched, who torments and dominates the patients in her care (and eventually sees one lobotomized).
They are just as vile as each other. The key difference is that Umbridge has more control being able to mask her " evil " and be in a government position where as Bellatrix is the person that has been caught and is more impulsive.
Apart from himself, Voldemort respects Albus Dumbledore because he was a worthy adversary. He also respects Salazar Slytherin, as he was a descent of him.
Why wasn't Dolores Umbridge ever afraid of Albus Dumbledore? Because, being a complete nut-case, she falsely believed Dumbledore could never hurt her. > “The Chair recognizes Dolores Jane Umbridge, Senior Undersecretary to the Minister,” said (Cornelius) Fudge.
Their relationship grew stronger after the death of Cedric Diggory, but Harry suspected Cho of betraying their secret student group. Cho's lingering feelings for Cedric and a lack of chemistry between her and Harry contributed to their breakup, leading to Harry ultimately ending up with Ginny Weasley.
She survived the war and eventually married a muggle Mr. Campbell and had a daughter named Erin. Even though Cho seemed very innocent and kind, she still couldn't get over the fact that Cedric Diggory was dead and Harry Potter, her new crush, had been right beside Cedric when he died.
Notably, Voldemort appeared to be entirely unaware of this split, as he later created a seventh Horcrux in his quest to have six, and continued to target Harry Potter despite him now holding part of Voldemort's own soul.
Hagrid's half-giant status also meant that Umbridge was highly prejudiced against him, viewing him as a "filthy half-breed", and so she became quite determined to get rid of him. Umbridge's biased and insulting inspections of his classes made Hagrid rather nervous, and he was soon placed on probation.
After Lord Voldemort destroyed the fragment of his soul residing in Harry, Harry seemingly lost the ability to speak Parseltongue, about which he was glad and relieved. Over the next twenty-two years, he never attempted to speak the language, presuming that it had died with Voldemort.
When the centaurs made threatening moves, Umbridge cast "Incarcerous" on the centaur Magorian, strangling him with ropes. The centaur Bane then picked her up and carried her away deeper into the forest screaming (what happened to her beyond that, during her time with the Centaur herd until she was rescued, is unknown).
None of the Malfoys were subsequently imprisoned in Azkaban because of this defection. Draco then married Astoria Greengrass sometime between 1998-2005, and had a son called Scorpius circa 2006. In 2017, Draco and Astoria were at King's Cross station to see Scorpius off to Hogwarts when Harry Potter saw him again.
Dolores Umbridge's horrifying personality was shaped by her upbringing and family history, including her disdain for her Muggle mother and Squib brother. Umbridge climbed the ranks at the Ministry of Magic by stealing credit for others' work and manipulating those in power, like Cornelius Fudge.
