Witches (魔女 Majō) are the monsters that the magical girls have a duty to fight. They are born from despair and negative emotions. Later in the series, it is revealed that Witches are born when a magical girl either runs out of magical energy or succumbs to despair, corrupting her Soul Gem beyond healing.
Madoka Magica Anime Series
The rose garden witch with a distrustful nature. She holds roses dearer than anything else. She expends all of her power for the sake of beautiful roses. Despite stealing the life-force of humans who wander into her barrier to give to her roses, she loathes the thought of them trampling the inside of her barrier.
- See also: Kazumi Magica Witches.