South Asia

Churel

A churel, also spelled as churail, chudail or chudel is a female ghost, well known in North India, Bangladesh and Pakistan. The word "churel" is also used colloquially for a witch. Women who die in childbirth or pregnancy due to the negligence of her relatives are often described turning into churels, who return to seek their vendetta and suck the blood of their male relatives. She is described as a hideous creature with long sagging breasts, unkempt hair and her feet are backward. 

Sometimes, she is described roaming naked. She may have a pot belly, claw-like hands, and scruffy and long pubic hair. She has an unnaturally long and thick black tongue and thick, rough lips; though sometimes she is reported as having no mouth at all. However, she disguise as a beautiful maiden to seduce young men. She drains their blood, semen, and virility, transforming them into aged men. 

Southeast Asia

Pontianak/Kuntilanak

Pontianak or Kuntilanak is a vampiric ghost in Malay and Indonesian mythology. Peoples believe it's a ghost of woman who died while pregnant. It usually descriped as pale-skinned woman with long hair and dressed in white, but it can transform into a beautiful woman since it prey on men. Its presence can sometimes be detected by a nice floral fragrance, followed by an awful stench afterward. 

A pontianak/kuntilanak kills its victims by digging into their stomachs with its sharp fingernails and devouring their organ, it rips out the sex organs with its hands.

Penanggal

Penanggal  is a beautiful old or young woman who obtained her beauty through the active use of black magic. Another cause where one becomes a Penanggal in Malaysians' folklore is due to the result of a powerful curse or the actions of a demonic force.

The Penanggalan's victims are traditionally pregnant women and young children.She perches on the roofs of houses where women are in labour, screeching when the child is born. The Penanggal will insert a long invisible  tongue into the house to lap up the blood of the new mother. 

There are similar myths of creatures with almost exactly the same features. Among ethnic groups in Indonesia, the ghost is called Leyak among the Balinese, Kuyang by the Dayak people of Kalimantan, or Palasik (or Pelesit) by the Minangkabau people. In Thailand it is called the Krasue, in Laos it is the Kasu or Phi-Kasu and in Cambodia it is the Ap.Balan-balan in Sabah(North Borneo)