Fenrir (or Fenris) is a gigantic and terrible monster in the shape of a wolf. He is the eldest child of Loki and the giantess Angrboda. The gods learned of a prophecy which stated that the wolf and his family would one day be responsible for the destruction of the world. They caught the wolf and locked him in a cage. Only the god of war, Tyr, dared to feed and take care of the wolf. When he was still a pup they had nothing to fear, but when the gods saw one day how he had grown, they decided to render him harmless. However, none of the gods had enough courage to face the gigantic wolf. Instead, they tried to trick him. They said the wolf was weak and could never break free when he was chained. Fenrir accepted the challenge and let the gods chain him. Unfortunately, he was so immensely strong that he managed to break the strongest fetters as if they were cobwebs. After that, the gods saw only one alternative left: a magic chain. They ordered the dwarves to make something so strong that it could hold the wolf. The result was a soft, thin ribbon: Gleipnir. It was incredibly strong, despite what its size and appearance might suggest. The ribbon was fashioned of six strange elements: the footstep of a cat; the roots of a mountain; a woman's beard; the breath of fishes; the sinews of a bear; and a bird's spittle. The gods tried to trick the wolf again, only this time Fenrir was less eager to show his strength. He saw how thin the chain was, and said that was no pride in breaking such a weak chain. Eventually, though, he agreed, thinking that otherwise his strength and courage would be doubted. Suspecting treachery however, he in turn asked the gods for a token of good will: one of them had to put a hand between his jaws. The gods were not overly eager to do this, knowing what they could expect. Finally, only Tyr agreed, and the gods chained the wolf with Gleipnir. No matter how hard Fenrir struggled, he could not break free from this thin ribbon. In revenge, he bit off Tyr's hand. Being very pleased with themselves, the gods carried Fenrir off and chained him to a rock (called Gioll) a mile down into the earth. They put a sword between his jaws to prevent him from biting. On the day of Ragnarok, Fenrir will break his chains and join the giants in their battle against the gods. He will seek out Odin and devour him. Vidar, Odin's son, will avenge his father by killing the wolf.
In Norse mythology, Hel is the ruler of Helheim, the realm of the dead. She is the youngest child of the evil god Loki and the giantess Angrboda. She is usually described as a horrible hag, half alive and half dead, with a gloomy and grim expression. Her face and body are those of a living woman, but her thighs and legs are those of a corpse, mottled and moldering. The gods had abducted Hel and her brothers from Angrboda's hall. They cast her in the underworld, into which she distributes those who are send to her; the wicked and those who died of sickness or old age. Her hall in Helheim is called Eljudnir, home of the dead. Her manservant is Ganglati and her maidservant is Ganglot (which both can be translated as "tardy").
Skoll (pronounced roughly “SKOHL”; Old Norse Sköll, “One Who Mocks”) and Hati (pronounced “HAHT-ee”; Old Norse Hati, “One Who Hates”) are two wolves who are only mentioned in passing references that have to do with their pursuing Sol and Mani, the sun and moon, through the sky in hopes of devouring them. At Ragnarok, the downfall of the cosmos, they catch their prey as the sky and earth darken and collapse.It’s not entirely clear which one of them pursues the sun and which pursues the moon. The medieval Icelandic historian Snorri Sturluson, whose works are typically taken at face value in low-quality introductory books on Norse mythology, claims that Skoll chases the sun and Hati the moon. However, Snorri’s source in this passage, the Eddic poem Grímnismál, says the following in the relevant stanza: Skoll is the name of the wolf Who follows the shining priest Into the desolate forest, And the other is Hati, Hróðvitnir’s son, Who chases the bright bride of the sky. The noun used for Skoll’s prey, goði (“priest”), is masculine, and the noun used for Hati’s prey, brúðr (“bride”) is feminine. Since Mani (the moon) is male, and Sol (the sun) is female, the wording of this stanza strongly suggests that Skoll hunts the moon and Hati the sun.This same stanza names the father of Hati (and surely, by extension, Skoll as well) as Hróðvitnir. Since another poem in the Poetic Edda, the Lokasenna, uses the essentially identical word Hróðrsvitnir (“Famous Wolf”) as a by name for Fenrir, the arch-wolf, it would seem that Fenrir is their father. This interpretation finds additional confirmation in another Eddic poem, the Völuspá, which states that the children of Fenrir swallow the sun during Ragnarok.
Jormungand. In Norse mythology, Jormungand is one of the three children of the god Loki and his wife, the giantess Angrboda. The gods were well aware that this monster was growing fast and that it would one day bring much evil upon gods and men. So Odin deemed it advisable to render it harmless. He threw the serpent in the ocean that surrounds the earth, but the monster had grown to such an enormous size that it easily spans the entire world, hence the name Midgard Serpent. It lies deep in the ocean where it bites itself in its tail, and all mankind is caught within his coils. At the destruction of the universe, Jormungand and Thor will kill each other.
Loki. Loki is one of the major deities in the Norse pantheon. He is a son of the giant Farbauti ("cruel striker") and the giantess Laufey. He is regarded as one of Aesir, but is on occasion their enemy. He is connected with fire and magic, and can assume many different shapes (horse, falcon, fly). He is crafty and malicious, but is also heroic: in that aspect he can be compared with the trickster from North American myths. The ambivalent god grows progressively more unpleasant, and is directly responsible for the death of Balder, the god of light. Loki's mistress is the giantess Angrboda, and with her he is the father of three monsters. His wife is Sigyn, who stayed loyal to him, even when the gods punished him for the death of Balder. He was chained to three large boulders; one under his shoulders, one under his loins and one under his knees. A poisonous snake was placed above his head. The dripping venom that lands on him is caught by Sigyn in a bowl. But every now and then, when the bowl is filled to the brim, she has to leave him to empty it. Then the poison that falls on Loki's face makes him twist in pain, causing earthquakes. On the day of Ragnarok, Loki's chains will break and he will lead the giants into battle against the gods. Loki is often called the Sly One, the Trickster, the Shape Changer, and the Sky Traveler. According to Georges Dumézil, Loki shows a great resemblance with Syrdon, a demonic creature from Caucasian legends.
Nidhogg. In Norse myth, Nidhogg ("tearer of corpses") is a monstrous serpent that gnaws almost perpetually at the deepest root of the World Tree Yggdrasil, threatening to destroy it. The serpent is always bickering with the eagle that houses in the top of the tree. Nidhogg lies on Nastrond in Niflheim and eats corpses to sustain itself. It is not the only serpent whose task it is to destroy the World Tree; other serpents include Graback, Grafvolluth, Goin and Moin.
In Norse mythology, the Norns are the demi-goddesses of destiny. They control the destinies of both gods and men, as well as the unchanging laws of the cosmos. They are represented as three sisters: Urd ("fate"), Verdandi ("necessity") and Skuld ("being"). They live at the base of the World Tree Yggdrasil in the realm of Asgard. Nothing lasts forever, and even the mighty Yggdrasil is subject to decay. The Norns try to stop this process, or at least slow it down, by pouring mud and water from the Well of Fate over its branches. This magical liquid stops the rotting process for the time being. In other myths, the Norns were thought to give assistance at birth, and that each person has his own personal Norn.
Odin. The chief divinity of the Norse pantheon, the foremost of the Aesir. Odin is a son of Bor and Bestla. He is called Alfadir, Allfather, for he is indeed father of the gods. With Frigg he is the father of Balder, Hod, and Hermod. He fathered Thor on the goddess Jord; and the giantess Grid became the mother of Vidar. Odin is a god of war and death, but also the god of poetry and wisdom. He hung for nine days, pierced by his own spear, on the world tree. Here he learned nine powerful songs, and eighteen runes. Odin can make the dead speak to question the wisest amongst them. His hall in Asgard is Valaskjalf ("shelf of the slain") where his throne Hlidskjalf is located. From this throne he observes all that happens in the nine worlds. The tidings are brought to him by his two raven Huginn and Muninn. He also resides in Valhalla, where the slain warriors are taken. Odin's attributes are the spear Gungnir, which never misses its target, the ring Draupnir, from which every ninth night eight new rings appear, and his eight-footed steed Sleipnir. He is accompanied by the wolves Freki and Geri, to whom he gives his food for he himself consumes nothing but wine. Odin has only one eye, which blazes like the sun. His other eye he traded for a drink from the Well of Wisdom, and gained immense knowledge. On the day of the final battle, Odin will be killed by the wolf Fenrir. He is also called Othinn, Wodan and Wotan. Some of the aliases he uses to travel incognito among mortals are Vak and Valtam. Wednesday is named after him (Wodan). Old Norse: Odínn
Thor is the Norse god of thunder. He is a son of Odin and Jord, and one of the most powerful gods. He is married to Sif, a fertility goddess. His mistress is the giantess Jarnsaxa ("iron cutlass"), and their sons are Magni and Modi and his daughter is Thrud. Thor is helped by Thialfi, his servant and the messenger of the gods. Thor was usually portrayed as a large, powerful man with a red beard and eyes of lightning. Despite his ferocious appearance, he was very popular as the protector of both gods and humans against the forces of evil. He even surpassed his father Odin in popularity because, contrary to Odin, he did not require human sacrifices. In his temple at Uppsala he was shown standing with Odin at his right side. This temple was replaced by a Christian church in 1080. The Norse believed that during a thunderstorm, Thor rode through the heavens on his chariot pulled by the goats Tanngrisni ("gap-tooth") and Tanngnost ("tooth grinder"). Lightning flashed whenever he threw his hammer Mjollnir. Thor wears the belt Megingjard which doubles his already considerable strength. His hall is Bilskirnir, which is located in the region Thrudheim ("place of might"). His greatest enemy is Jormungand, the Midgard Serpent. At the day of Ragnarok, Thor will kill this serpent but will die from its poison. His sons will inherit his hammer after his death. Donar is his Teutonic equivalent, while the Romans see in him their god Jupiter. Thursday is named after him.