Hawkfrost

Hawkfrost is described as a dark brown tabby tom with a white belly and ice blue eyes.

The Darkest Hour
Coming Soon

Midnight
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Moonrise
In Moonrise, it is hinted that Hawkfrost is dark-hearted when he makes comments to Mothwing about how RiverClan could take over the other Clans' territory because they are weaker.

Dawn
Coming Soon

Starlight
In Starlight, he sided with Mudclaw of WindClan and led a rebellion against Onestar, the WindClan leader, (then Onewhisker) when he still had only one life. When Mudclaw was killed by a falling tree that had been struck by lightning, Hawkfrost (and many others) saw it as a sign from StarClan and apologized for his actions.

Twilight
In Twilight Hawkfrost was very good hearted, to Brambleclaw at least, despite Squirrelflight believing that he is untrustworthy. Other than insulting Mistyfoot's job as RiverClan's deputy, practically to her face, and his dreams with Tigerstar where he promises to follow in his father's pawsteps, Hawkfrost is an excellent warrior. He helps with the toxic Twoleg waste incident by building a thorn barrier around the object with Blackclaw's help. He also thanks Leafpool when she reminds him to wash his paws in a stream.

Sunset
In Sunset, his heart somewhat darkens under Tigerstar's help, and Hawkfrost is shown largely trying to stir up trouble. It is revealed that it was he who placed the moth's wing at Mudfur's den, causing him to take it as a sign from StarClan and take Mothwing as an apprentice. He now threatens to reveal this secret in order to control Mothwing. Hawkfrost uses this control to get his sister to tell all of the Clans about a dream at a Gathering. Made up by Hawkfrost, the dream had the image of a stream with two large pebbles blocking its flow until they were removed. The dream suggests that two cats who are unlike the rest, Stormfur and Brook, should not be welcomed in RiverClan and that they need to be expelled in order for the Clan to function properly. Hawkfrost is also plotting with his father, Tigerstar, in dreams more so than Brambleclaw, and the two devise a test. After Brambleclaw is made deputy of ThunderClan, Hawkfrost traps Firestar in a fox trap, and orders his half-brother to kill Firestar and take over ThunderClan. Brambleclaw refuses, yanking the trap off of Firestar and plunging the sharp end into Hawkfrost's throat, killing him. Moments before he dies, Hawkfrost hints a ThunderClan warrior helped him and vows that their feud is not yet over.

The Sight
In The Sight Hawkfrost and Tigerstar tempt Jaypaw into joining them. Spottedleaf however intervenes and leads Jaypaw away.