The Shattering: Prelude to Cataclysm
Perith accompanied Cairne to Orgrimmar for a celebration for the veterans of Northrend. When Cairne left, he sent Perith ahead to notify Baine of his father's arrival. Later he was present for the mak'gora duel between Cairne and Garrosh. Following the death of Cairne at the hands of Garrosh Hellscream, Perith was the only Longwalker to make it past the Grimtotem patrols to report the news of Cairne's death. He met with Baine, Jorn Skyseer, Jevan Grimtotem, and Hamuul and watched their conversation in silence. Afterwards he traveled to the shaman Drek'Thar in hopes of finding out where Thrall was, to relate his news. With the news of Cairne's death, Drek'Thar returned to himself enough to help Perith on his mission and asked that he related Drek'Thar's visions to Thrall as well. He then made it successfully into Garadar, where he met with Thrall and told everything what happened.
Tides of War
After the Horde conquered Northwatch Hold, Perith was sent by Baine Bloodhoof to warn Lady Jaina Proudmoore that her home of Theramore was their next target. Perith also delivered the dwarven mace Fearbreaker to Jaina, not only as proof that it truly was Baine that sent him, but also with the request that she return it to Anduin Wrynn, as Baine no longer felt like he should wield it. As he left, Perith assured Jaina that he would not be caught. He successfully returned to Baine and told him about Jaina's thankful reaction.
He, as the most trusted Longwalker, accompanied Baine and Kador Cloudsong to the trial Garrosh Hellscream. Perith was called as the ninth witness during the sixth day by Tyrande Whisperwind, who was concerned that Baine was compromising the trial. At first, he refused to reveal any secrets of his chieftain, but Baine ordered him to do so. He explained the role of a longwalker and told the trial about the secret meetings between Baine and Jaina.
Before the Storm
When several Horde figures, including Warchief Sylvanas, gathered in Spirit Rise to discuss the catastrophe in Silithus, Perith arrived and informed Baine about Magni Bronzebeard who came to Mulgore to visit Sylvanas. He then took Arandis Sunfire to Magni's location. The dwarf needed a portal as he was too heavy for the city lifts.
Perith was also the messenger meeting with Valeera Sanguinar who was delivering letters on Anduin Wrynn's behalf to the tauren leader. He gave the blood elf a letter stating the friendship between Baine and Anduin had to end for now as well as a piece of Baine's horn. He also did not accept the letter from Anduin, so that it wouldn't endanger Baine, but promised her that he would inform the high chieftain about it.
In the RPG
Perith Stormhoof is a tauren holy strider. While he is not famous in Azeroth, the name of Perith Stormhoof is whispered with reverence among the holy striders. He is one of the oldest holy striders. Tauren whisper that he has visited both Northrend and Theramore without injury, and he has even seen the shattered remains of Draenor. Perith does not confirm or deny these rumors; he knows that they only strengthen the respect and therefore worth of the holy striders.