Sekhmet is the Witch of Sloth.

Appearence: Sekhmet gives off a lazy impression with absurdly long reddish purple hair and unhealthy looking bluish white skin and lips. Her eyes give off a sense of spiritlessness. She wears a black clerical robe that is dirty and frayed, furthering her lazy impression.

History: Before she was born, Sekhmet's clan expected things from her, wanting to bring back their founder known as God. However, after she was born, she disappointed them, causing them to hold her in disdain and abandon her as punishment. Many years later, upon hearing of a wild woman in the mountains, men came and captured her, taking her down to the city. While there, she gained knowledge, a way of life, and emotions. Eventually, not understanding at the time that what she felt was gratitude and obligation, she snapped the necks of the men in the place she lived in and left. Returning to her homeland, she proceeded to kill her entire clan, not understanding at the time that what she felt was hatred and a desire for revenge. She then returned back to her previous home to give the men she killed a proper burial, and once she was alone, she felt a peace of mind, which she felt happiness about.

(Source: Re:Zero Wiki)