Starlight Glimmer

Starlight Glimmer is a character introduced in the fifth season of the children's animated television series My Little Pony: Friendship is Magic, sometimes referred to as MLP G4. While many other characters from the show could be labeled as sexywomen for their popularity and one or two fitting traits, the contentious nature of Starlight among the fanbase makes her more worthy of the title.

Basic Information
Starting out as an antagonist in her debut episodes, Starlight later went on to play a large role in the story, eventually becoming a member of the main cast after being reformed much like other villains from the show were before her. Her initial beliefs involved the idea that cutie marks caused disharmony among ponies, marking some as more skilled or more important than others. This was all caused by an event in her past where she was separated from her childhood friend after he gained a cutie mark that marked him as a powerful magic user. She was also designed to be a foil to Twilight Sparkle in both beliefs and design with her similar color palette and use of magic to help (rather ingenuously in Starlight's case) the people around her.

More information on the character can be found on the Friendship is Magic wiki.

Angst
An attempt at it, you're supposed to feel bad for her after hearing her backstory.

Anthro
She, like most of the cast, is a pony. A unicorn if you want to be specific.

Dominating
Was in a leadership role in her debut and was feared by the denizens of her village. Her magically abilities also make her a force to reckoned with.

Girlboss
She ran a very cult-like operation for an unknown period of time and messed with the course of the timeline in various ways for her own benefit. A lot of fans found this type of villain very intriguing and became invested in her actions despite how morally bankrupt they were.

Intelligence
Magic is a learned skill in this universe, so someone has to study to get better at it. The level of Starlight's education is unknown but we can infer she's at the very least adept at personal study.

Nonhuman
She is a pony.

Power
Magical in nature, she was shown to be able to go hoof to hoof with Twilight in ability despite the other's inherent power due to her status as an alicorn princess.

Power of Love
She was reformed in a similar fashion to how other characters in the show were, through compassion and understanding.

Purple
Most of her design involves various shades of purple, interspersed with stripes of light blue.

Villain
Was the big bad for both the season 5 premiere and finale. She simply hung around in the (literal) background scheming in-between those two appearances though.

Vriska Archetype
Had zero moral qualms with how she ran her village initially and was ready to disastrously affect the timeline for her own gain, her confidence and dedication to her beliefs made her quite appealing to some fans and unappealing to others. The latter view mostly being spurred on by the fact that her beliefs were of a much more political nature than those of past villains. These aspects of her character eventually died down as she was redeemed, for better or for worse. Even so, whether her redemption was justified was and still is a topic of debate among fans, especially when put next to later villains who didn't get as nice an ending. The general opinion of her presence in the show is also pretty 50/50, some thinking she's one of the best later season characters and others that believe she was one of the things that started to drag the show down.