Among the Mongols, malicious spirits (usually the souls of those who died unnaturally or sinners) are loosely differentiated in their functions and appearance, and their common "ancestral" characteristic is to bring illness to humans by inhabiting their bodies or capturing their souls.
Among the Adites (in Muslim mythology, "ada" is one of the indigenous peoples of Arabia), the soul of an unmarried woman turns into a demon that flies through the air, frightening people, spreading diseases, and inciting violent passions. Buryats believe that the soul of a deceased child becomes a kind of domestic spirit called "ada" which can be either benevolent or malicious. In shamanistic practices, harmful demons include:
— boo holdoy — the spirit of a person who died an "unnatural" death and is dangerous to the living;
— muu shubuun ("evil bird") — the soul of a woman who got lost in the forest and turned into a forest werewolf and cannibal, appearing as a beautiful girl luring lonely hunters into a cave;
— dahool ("sticking close") — the spirit of a poor person, girl, or young woman, deadly to children but not to adults, and usually considered a natural part of the clan or tribe; only a shaman can ward it off.
When discussing restless spirits and evil ghosts that some of the deceased turn into, it refers to people who have not expended their allotted life energy, which is the cause of the appearance of a malicious ghost.
II. Demons of calamities. Malevolent spirits of circumstances and coincidences are opponents of the shaman. In Mongolian mythology, they include demons of rage, obsession, misfortune, and disaster, known as dzedger, tuydger, toduur (literally "hindrance, obstacle"), which derails a person from their path (both literally and metaphorically) and captures their soul. The Siberian tradition also includes likhomanke — spirits of illnesses, and so on.