There's always the Eskimo, Alutiq, and Unungan (Aleut) traditional monsters.
Raven isn't so much as trickster as in lower 48 versions, but is a wise and witty teacher, who teaches painful lessons when not respected. Take a raven, make him 4' tall, with a 20' wingspan. Should be (mechanically) a high level Paragon (WWiz), using a 3d beak or dropped item (1d/10', ranged to hit.) In some variants I've heard, Raven is king of a race of oversized talking ravens...
Raven's folk: St ×1/2, Dx ×3, Co ×1, Sp ×2, IQ ×3, Ch ×1, Wiz ×2, Lk ×1/2, flying. Cannot wear armor. No hands, but can manipulate using beak and a foot to work equal to one hand. height ×½, wt ×1/10. Natural armor (plumage) 2 points.
Raven himself is said to be able to shapeshift in some myths, and while presented as male, shapeshifts to a young woman...
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Nanook/Nanuk (Inuit-Inuktitut for Polar Bear) is a similarly master of his species oversized polar bear...
“In Inuit mythology, Nanuk (which means polar bear in Inuktitut) was the master of the bears. Inuit hunters worshiped the great bear, believing that he decided which hunters deserved success. Legend says that if a dead polar bear was treated properly by the hunter, it would share the news with other bears, and they would be willing to be killed by him. All of the meat — save for the liver — was to be eaten, the skin used for clothing (one bear can make three pairs of trousers and a pair of mukluks). Hunters were meant to pay respect to bear’s soul by hanging the skin in a special place in his house for several days, and the spirit was offered tokens... If, however, a hunter violated these rules and mistreated a bear or its spirit, other bears would avoid him and he would not be successful in his hunts.”
Note that Polars DO actively hunt humans from time to time. We're less preferred over walrus and seal, but Polars will stalk and eat humans when hunting gets poor.
The Inupiaq (Eskimo) version is similar, but when disrespected, Nanook sends bears to raid the town...
Also, eating the liver can be lethal... which is probably why it's exempted. Note that a Yupic standard is a bear is a complete outfit for a hunter: trousers, kuspuk (hooded tunic), mukluks (boots), Mittens, and some utilitarian items - quiver, pouch, baby's chestpack... One can make a sleeping bag out of a bearhide, too - polars are long enough.
Also note: All traditional Yupiq and Inupiaq skin garments retain the fur... but it's on the inside so it doesn't get watersoaked. This keeps it warmer in harsh weather.
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There are likewise traditional Inupiaq & Yupiq (collective: Eskimo), archetypes for seals, narwhal, beluga whale, salmon, seagull, walrus, puffin, arctic fox, arctic hare, and arctic tern.
Note on Eskimo vs Inuit: the Alaskan Eskimo I've known hate being called Inuit, since Inuit is one of 6 or 7 distinct cultural groups in the same cultural superculture; the Inuit are related to the Eskimo of Alaska and Siberia, but reject the collective term Eskimo - to the point that joint activities across the Alaska/Canada border use "Eskimo/Inuit" to get both Canadian, both Alaskan, and the Siberian peoples covered. (Which leaves the Alutiiq and King Islanders - the latter being considered Inupiaq by many, and idendifying as a subgroup thereof, and the former considered Inupiaq by the Unungan, and Unungan by the Inupiaq...)