The Black Prism
Tremblefist was first encountered in the Black Prism. After Kip and Gavin escaped from Rekton they took an in direct route to the Chromeria. Instead of stopping at the Jaspers they stopped at cannon island. When Tremblefist and his brother Ironfist saw the Prism drawing near they helped to bring the luxin craft in by holding their fist in the air as a target for the Prism's luxin ropes. Ironfist and Tremblefist also had a fight a long time ago which Ironfist just won. It is said to have been the fight of the century.
The Blinding Knife
In the Blinding Knife Tremblefist did not have many major appearances, however Ironfist explained his brother's history. Apparently their mother was a regional governor in their satrapy of Paria, after their mother was killed Tremblefist inherited the position. In order to solidify his position he was pressured to marry and solidify alliances with the other Parian tribes. However instead of marrying the plain daughter of a powerful tribe Tremblefist chose the beautiful daughter of a weak and out of favor tribe. His wife used her position to exact insult to those other tribes that had once looked down on her and her people. She was no peacemaker and eventually this led to tragedy. While Tremblefist was away the insulted tribesmen came to the estate and murdered his wife his childeren and their entire staff all the slaves and servants. When Tremblefist returned he found the murders asleep and passed out drunk amidst the bloody bodies. Tremblefist went mad. He killed every single living person in his estate. Then he went to the tribes land and he killed every single man woman and child until not one member of that tribe was left alive.
The Broken Eye
In the Broken Eye Tremblefist and his brother, commander of the Blackguard, Ironfist have a demonstration fight. Tremblefist beats him in the first bout easily, but eventually loses against an unconvential weapon Ironfist has trained in. When Ironfist asks Kip's squad what they learned. Kip remarks that Tremblefist is better than Ironfist and that he let Ironfist win in the first fight to boost Ironfist's reputation because he believed in Ironfist as a leader in a way he does not believe in himself after the massacre. Even his name is chosen for that purpose: if Tremblefist is this good, can you imagine how good Ironfist has to be? When Ironfist finally realises that Tremblefist has given up his future for him he breaks down and cries. Tremblefist comforts him and trains Kip's squad. When Kip and his squad are pursued by the Lightguard Tremblefist helps them. Against all odds the squad makes it off Big Jasper to the ship, but a cannon crew tries to blow them out of the water. Tremblefist takes out all of the 20 cannon crew, who are equipped with muskets under a minute without as much as a scratch. Then the gunpowder explodes leaving Tremblefist mortally wounded in the water. Ironfist finds him and Tremblefist dies in his arms.