About Helga Hufflepuff
Helga Hufflepuff is one of the four Founders of Hogwarts School of Witchcraft and Wizardry, the other three being Godric Gryffindor, Rowena Ravenclaw and Salazar Slytherin. Hufflepuff is said to have come from a broad valley, possibly in Wales. The Sorting Hat describes her as "good Hufflepuff" or "sweet Hufflepuff". She favoured loyalty, honesty, and dedication in her students. In Goblet of Fire, she is said to have considered "hard workers most worthy of admission". Elsewhere, she is described as taking "all the rest" of the students after selection by her colleagues. She was a good friend of Rowena Ravenclaw; their friendship is used to emphasise the failed friendship between Godric Gryffindor and Salazar Slytherin.
Hufflepuff was particularly famous for her dexterity at food-related Charms. Many recipes traditionally served at Hogwarts feasts originated with Hufflepuff. Her wizard card, penned by Rowling, describes her as having "brought people from different walks of life together to help build Hogwarts", and being "loved for her charming ways". According to an interview between Rowling and staff from The Leaky Cauldron, Hufflepuff introduced house-elves to Hogwarts, where she offered them refuge. Both the famous wizard card and the illustration on Rowling's website depict her as a plump woman with red hair.
One relic of Hufflepuff, a small golden cup, emblazoned with her symbol of a badger, is passed down to her distant descendant, Hepzibah Smith. This cup is stolen by Tom Riddle and made into a Horcrux.
+ Credit must go to lunalouise @ deviantART for letting me use her gorgeous fanart in the header :)