|“||Your hair's messed up, your nails are chipped. You're a sad and miserable human being and you want me to turn you.||”|
Almost every character that has met both of them have remarked that Katherine looks identical to Elena; indeed, they are both doppelgängers of their common ancestors, Amara and Tatia. As such, Katherine is an extraordinarily beautiful and seductive young woman: she has an oval face with fine bone structure, a wealth of brown curly hair, and almond-shaped, deep brown eyes with thick dark lashes.
The simplest way of distinguishing Katherine from Elena is in observing basic cosmetic differences: Katherine favors a curly hair style, while Elena typically wears hers straight; Katherine often pairs a sensually cut outfit with heels, while Elena is usually seen wearing comfortable, practical options like jeans, T-shirts and sneakers; and Katherine tends to wear more makeup than Elena.
However, there are subtle differences between the two that a keen eye can detect. Katherine's eyes seem to be a shade darker than Elena's, having a smoky, shadowy appearance; where Elena's eyes are guileless, Katherine usually seems to be hiding something behind hers. Her mannerisms are more deliberate, almost as though she is performing for her audience - a skill that comes in handy when she wants to borrow the identity of the younger doppelgänger. Even her speaking voice seems harsher, more cutting than Elena's.
Whenever Katherine pretends to be Elena she dresses very similar to Elena's style and straightens her hair. But she also can’t help but still rock some major cleavage.
In season one, Katherine's personal wardrobe was seen only in flashbacks to the 1800's. For the antebellum era of the south, Katherine dresses very revealing and sexy, often revealing cleavage and/or showcasing her decolletage in her day wear, which was usually designated for evening wear. She also wore colorful clothing, which was further uncommon to the era. Katherine is shown wearing hoop skirts and bodices with hook-and-eye closures, and carrying parasols.
Katherine wore her hair in tight ringlets, often accompanied by a hat, and her hair up and pulled away from of her face.
During the Antebellum era of the United States, makeup was reserved for elite members of society such as royalty, though at times it was said to be worn by brothel women in a rather grotesque manner. Though Katherine and other women of Mystic Falls do not meet any of the aforementioned criteria, they are shown wearing makeup. Katherine's makeup in season one is very similar to Elena's; simple yet eye catching, which contrasts to Katherine's dramatic makeup in the present day.
In season two, Katherine is seen in flashbacks to 1490, 1492, and 1864, as well as the present day. In 1492, Katherine is shown wearing a houppelande, a full bodied dress with floor length sleeves. Velvet, linen, satin, and silk were popular fabrics of the time. For the antebellum era of the south, Katherine dresses very revealing and sexy, often revealing cleavage and/or showcasing her decolletage in her day wear, which was usually designated for evening wear. She also wore colorful clothing, which was further uncommon to the era. Katherine is shown wearing hoop skirts and bodices with hook-and-eye closures, and carrying parasols. In the present day of season two, Katherine wears very edgy, stylish clothes. She often wears booties, heels or boots. Much like the rest of the cast, Kat wears dark clothing.
In 1492 flashback, Katherine's hair is long and appears to be naturally wavy. In 1864, Katherine wore her hair in tight ringlets, often accompanied by a hat, and her hair up and pulled away from of her face. In the present day of season two, Katherine wears her hair parted down the the middle and on occasion, parted on the side in lose curls that fall below her bra straps.
Throughout the present day of season two, Katherine changes between smokey eye makeup to a cat-eye look.
Katherine only appears in four episodes of season 3, impersonating Elena in both Homecoming and The Reckoning. The End of the Affair and Disturbing Behavior are the only two episodes where Katherine's personal style is showcased. Katherine is shown in 1920's Chicago as well as the present day. Her 1920's look is strongly reminiscent of the 1920's era flapper, with her hair in a page boy, wearing short dresses or skirts, and long beads. While impersonating Elena in the present day, she dresses conservatively, but as herself, she dresses provocatively.
When Katherine is not impersonating Elena, her hair is worn in lose ringlets and parted down the middle.
Katherine appears in We All Go a Little Mad Sometimes as a hallucination, impersonating Elena in Down the Rabbit Hole, and American Gothic, all of which were set in the present day. Katherine continues to dress seductively, similar to seasons 1-3.
Katherine wears her hair parted down the middle and in lose curls when she is not impersonating Elena.
Now that Katherine has returned to being a human, she became weaker and slower than how she was, being a vampire. She soon realized that she could not protect herself. She begged Damon to let her stay at the boarding house. She started to care more for her life, instead of her physical appearance. She is seen with her hair messed up. Her nails are chipped. She continues wearing heavy makeup, but looking through the way it is smudged, it seems like she doesn't care about it either. There are big dark circles under her eyes. All of her sexy, fashionable outfits are no longer seen. In the first episode of Season 5, for the very first time, she is spotted with hoodie and baseball cap. She continues wearing heels, though. Once, she complained with Damon about how much enemies she had, and how she started getting blisters for running in heels.