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Sasquatch: Known colloquially  as "Bigfoot," is a primate-like animal believed to inhabit the forests of North America, although people claim to have sighted the creature in every part of the Unitied States and most of Canada. Akin to the infamous Yeti of the Himalayan Mountains, Sasquatch lore dates back to the earliest Native American tribes.

Sagari: Horse's head that dangles from trees to spook unsupecting mortals. 

Saci: The Saci is arguably the most popular character in Brazilian Floklore. He is a one-legged black or mulatoo youngster with holes in the palms of his hands, who smokes a pipe and wears a magical red cap that enables him to disappear and reappear wherever he wishes (usually in the middle of a dust devil). Considered an annoying prankster in most parts of Brazil, and a potentially dangerous and malicious creature in others, he will nevertheless grant wishes to anyone who manages to trap him or steal his magic cap.

Satyr: Orignated in Greek and Roman mythology, they are discribed having the upper bodies of a human man, the legs and horn of a goat. Their favorite pass times are roaming the countryside, lusting after maidens and nymphs, and revle with the gods Pan and Dionysus.

Satori: An ape like humanoid that has been known to be sighted in the moutian regions of Japan. They are known to have an ability to read minds. 

 Scylla: Acording to legend, she was once a sea nymph until the jealous witch Circie truned her into a  terribile sea monster with the upper half of a human woman, six heads of dogs, and eight tenticals. 

Selkies: They're seaside faeries native to the northern Scottish islands. They appear as seals with some human characteristics, but legend says that they can shed their sealskin and appear with perfect male or female forms, which are very alluring to young men and women.

Sea Serpent: A sea serpent or sea dragon is a type of sea monster either wholly or partly serpentine. Sightings of sea serpents have been reported for hundreds of years, and continue to be claimed today. They are konwn for causing tidal waves with the swipe of their tail, and damage ships. 

Siren: In Greek Mythology the Sirens were creatures who lived on a remote island surrounded by rocky cliffs. The Sirens lured passing sailors by their singing, which would enchant any sailor listening to the point that he would lose all will-power, and crash his ship upon the Sirens' rocky shore and cliffs, killing all the men aboard.

Shedu: A Protective spirit with the form of a winged bull or lion with a human head.

Shellycoat: A type of water goblin that adorns itself with sea shells and haunts rivers and streams of Scottland, England and Germany. 

Sleipnir: The eight legged steed of the Norse god Odin. 

Sphinx: The sphinx has had a long history of secrecy and intrigue, being viewed by many cultures as guardians of knowledge and as speaking in riddles. The sphinx varies in physical features, but is almost always a composite of two or more animals, and some versions are part-human part-animal. Whatever the form, the sphinx embodies paradox, beautiful and alluring, she is also dangerous even deadly; encountering a sphinx is described as confusing and destructive and requires great caution when approaching.

Spriggans: Ugly and grotesque looking goblins with an ability to alter their size. They haunt in old ruins to gaurd treasures from theives. 

Simargl: A winged wolf or dog of Persian mythology. 

Skin Walker: A person with the natural ability to turn into any animal he or she desires. To be able to transform, legend sometimes requires that the skin-walker wears an animal pelt. 

Sune-kosuri: A youkai that resembles at gribble or hamster. They cause people to trip.

Stymphalian Birds: Birds of prey with bronze beaks and sharp metallic feathers that could pierce their victims with it. 

Shojo: A humanoid youkai with red skin and hair. They enjoy dancing, merrymaking and drinking.

Swan Maiden: The swan maidens were Welsh fees who could transform themselves into swans by wearing a cloak of feathers.

Squonk: Claimed to be the ugliest creature of all living things, because of its wart covered skin and pig like body, weeping over it's hideous apperiance. This creature has been known to habit the forest of Pennsylvania.  

Succubus: A female demon, know to seduce mortal men in their sleep and drains their energy.

Strix: Vampric olws that feed on the blood of infants. 

 Sylph: Elemtal spirit of air.