With Others comes an unnatural and terrible cold (I: 7)
The Others are tall, gaunt, and hard. Their flesh is pale as milk (I: 7)
The Others wear armor that shifts colors; white as snow, black as shadow the grey-green of trees. The patterns of color move with every step (I: 7)
The swords of the Others are translucent, like shards of extremely thin crystal with a faint blue ghost light that seems to play around it. The blades are sharper than any razor (I: 7)
The eyes of the Others are a deep, inhuman blue that burns like fire (I: 7, 8. II: 272)
When steel meets the blade of an Other, a high keening sound almost beyond hearing can be heard (I: 8)
Steel begins to frost as it contacts the cold sword of an Other (I: 8)
The Others have their own strange language, and their voices sound like the cracking of ice (I: 8)
When steel meets the blade of an Other enough, it can shatter from the cold (I: 8)
When a man is slain by the Others, he can become a wight. One sign of this is eyes that have changed to an unnatural blue, as well as an icy cold body (I: 9)
Wights made by the Others have flesh as pale as milk, although their hands are black as if with deep frostbite because the blood congeals there (I: 464. V: 69-70)
The blood of wights turns into a dark dust rather than clot and congeal (I: 465)
Wights could be dead for days and have no stink such as corpses would have in that time (I: 465)
Animals; even worms and maggots; avoid the body of a wight. Neither horses nor dogs will go near them (I: 465)
A wight is strong enough to break a man's neck, turning the head around to face the wrong way (I: 472)
A wight is able to sneak up on a guard, turn a latch, and hunt for a particular person that it seems to remember from when it was a living person (I: 472, 473. II: 265)
Wights can seem dead by day but can return to animation in darkness (I: 473)
Cutting into a wight feels wrong, and it releases a strange and cold smell that makes on want to gag (I: 473)
Even if a limb is removed from a wight it is still animated (I: 473)
The unnaturally blue eyes of wights come from an equally unnatural frost that covers them (I: 474)
One weakness of the wights is fire. They burn as readily as dry wood and their skin melts away (I: 547)
Even with its head removed, a wight can continue fighting (I: 550)
Some wildlings believe the Others are gods, calling them the cold gods in the night and white shadows; they give up animals and even children to appease them when 'the white cold' comes (II: 271)
The wildlings call the Others the white walkers (II: 381)
Animals can be turned into wights (III: 202)
Wights can still be useful even if their flesh is rotted (III: 204)
The Others can ride wight-horses (III: 207)
Others appear to be very light, as their feet do not break the thin icy crust of snow (III: 207)
The swords of the Others gleam with a faint blue glow (III: 207)
Dragonglass is dangerous to the Others. When it strikes, it makes a cracking sound like ice breaking (III: 208)
The Others have pale blue blood (III: 208)
The blood of the Others will hiss and steam around black obsidian (III: 208)
The Others have bone white hands (III: 208)
Any of the flesh of the Others that comes in contact with dragonglass begins to smoke and melt away (III: 208)
The Others will melt and puddle, dissolving, because of dragonglass. In twenty heartbeats, their flesh can be gone, and the bones will melt away as well leaving only the lingering steam (III: 208)
The Others have bones like milkglass, pale and shining (III: 208)
Even after melting an Other away, dragonglass will feel freezing cold (III: 208)
Wildlings who sacrifice infants to the Others seem to believe that the infants are raised by the Others and come back to continue taking children (III: 380)
Wildlings believe the Others and their wights can smell life, and that the newborn stink of life most of all (III: 533)
Wights do not show fear when confronted with dragonglass (III: 534)
Wights are clumsy (III: 535)
When a wight is destroyed, the blue disappears from its eyes (III: 535)
A description of a strange woman that seems much like an Other or one of their wights, part of the legend of the Night's King (III: 629, 630)
The Others appear only at night (III: 838)
There is a suggestion that the Others are creatures of the God of Night and Terror who wars eternal against R'hllor (III: 868)
Tales claim that the Others come when it is cold. Some say that it becomes cold when they come. It's said they appear during snowstorms and mealt away when the skies clear, so that they hide from the light of the sun and emerge at night; although some stories claim that their coming brings the night. There are tales of their riding the corpses of dead animals such as bears, direwolves, mammoths, and horses, and that they also ride upon giant ice spiders. Tales also tell that those who die fighting them must be burned or their bodies will rise up as their thralls (IV: 80)
The armor of the Others are said to be proof against ordinary weapons and that their own blades are so cold as to shatter ordinary steel. They are said to be vulnerable to dragonglass, however, and fire is said to dismay them (IV: 80)
The last hero is said to have killed Others with a sword of dragonsteel (IV: 80)