Partly inspired by one of the entries, these are the characters who can wear absolutely anything, these characters never stick to one outfit for very long, they always change clothing frequently and have plenty to choose from, so without further delay lets begin.
Honorable Mentions
Elizabeth Midford from Black Butler
Always appears in a different dress each time she appears, if it weren't for restrictions in the time period she'd wear every type of dress going.
Isaac & Miria from Baccano
They wear a different costume on every heist but the series is too short compared to the other entries who come from longer series.
Any Idol or Precure Anime
Because naming them all would not make this list very interesting.
10. Toru Kouno, Yuujirou Shihodani and Mikoto Yutaka from Princess Princess
Our first entries are the only male entries on this list, saying that these pretty boys can pull off absolutely anything whether it be male or female clothing, a testament to the art design this anime has.
9. Naru Narusegawa from Love Hina
As the artist's favorite, Naru gets the pick of pretty much every costume going including anime only, manga covers and promotional art exclusives. It helps that Ken Akamatsu is a cosplay otaku and that his wife is the inspiration for Naru.
8. Usagi Tsukino from Sailor Moon
While all the Sailor Scouts go through a decent wardrobe of clothes, Usagi gets bonuses for using disguises and battle costume upgrades, heck she even pulls off a very convincing male in the manga.
7. Lum from Urusei Yatsura
The only entry on this list to have more costumes in promotional art than her actual anime, it's something which Rumiko Takahashi did alot of which would transfer into Ranma 1/2, in fact for a long time Lum was the face of anime itself.
6. Honey Kisaragi from Cutey Honey
Honey is a master of disguise and will show case any costume when the situation calls for it, in fact her trademark catchphrase often involves her showcasing her disguises before becoming Cutey Honey.
5. Yuri from Dirty Pair Franchise
Yuri is an interesting case because a good majority of her wardrobe appears in one episode of the Flash series if only to spoof how many outfits she's had over all series in the franchise even those outside of Japan with the Adam Warren comics.
4. Rebecca Miyamoto from Pani Poni Dash
Appears in a different outfit every episode and some of her DVD cover costumes are spoofs of other anime characters like Gendou Ikari or cultural icons like Bruce Lee and the Terminator.
3. Sakura Kinomoto from Card Captor Sakura
This is the only entry to actually have her own personal fashion designer in Tomoyo, not by choice and Tomoyo is a little too eager to dress up Sakura for all her battles. Saying that, this is the most diverse set of Magical Girl costumes ever assembled in one show.
2. Erza Scarlet from Fairy Tail
She has an armor for every occasion and battle, she even uses her magic to change into regular clothes, she even has special outfits she only gets out when the situation calls for it such as her legendary bikini and her wedding dress. I hate this word but Erza is a real fashionista.
1. Fujiko Mine from Lupin III
This women has appeared in disguises so often that one wonders what she really looks like normally, this even became the subject of her own TV Series spinoff. While previous entries have multiple clothing and one trademark outfit, Fujiko Mine just wears everything and anything, even her trademark catsuits are diverse.