Acheri

In Native American folklore Acheri is thought to be the ghost of a little girl who died of disease. Legend has it that Acheri is a frail and pale looking female spirit who lives on mountaintops and hills. At night she travels into valleys and spreads infection, disease and pain, usually to children, by casting her invisible shawdow over innocent sleeping victims.
It is thought that the colour red affords protection against this entity and amulets of red thread worn as necklaces will protect children from disease Acheri brings. Similarly, in European folklore, red charms are used to protect agains harm from evil spirits.