A Langa Voni (in Telugu) (or Langa Dhavani in Kannada or Pavadai Dhavani in Tamil language) is a traditional dress worn mainly in the states of Andhra Pradesh, Karnataka, Tamilnadu and Kerala by young girls between puberty and marriage. It is also called as two-piece saree or half saree.It comprises a Lehengaor Pavadai which is tied in the waist using string and an oni or Davani, a see through fine cloth usually 2 to 2.5 metre in length which is draped diagonally over a choli (a tight fitting blouse, same as worn for saree) and is usually woven with cotton or silk. A variant of this is Gagra choli of North India (the difference between the both being in the way of draping the oni or pallu).

The half saree provides a smooth switching from paavadai (full skirt) and sattai (tops), the traditional dress of small girls, to the complexity of draping a saree. Usually the paavadai and oni are brightly colored and contrasting to each other and look like the sari. Just like the sari, oni is also worn by wrapping it around the waist, with one end then draped over the shoulder baring the midriff.

Oni (鬼^?) are demons or ghouls (ghosts) of Japanese folklore.

Oni may also refer to:

ONI may refer to:

Amala Paul (born October 26, 1991) is an Indian film actress, who works primarily in the Tamil film industry. After appearing in supporting roles in a few low budget ventures, she received critical acclaim for the portrayal of a controversial character in the film, Sindhu Samaveli. Despite the failure of that film, Amala became noted after playing the title role in Mynaa, receiving critical acclaim for her work. Since then, she has been signed on for several notable projects and is considered the leading upcoming actress in Tamil films.