The Winter Knights
Raffix was the founding member of the "Winter Knights" - the gang which also included Quint, Phin, and Stope. They journeyed into Open Sky with Maris and cured the Cloudeater, ending the Endless Winter.
Raffix met Quint and Phin (still Lower Hall squires) on Treasury Day, when he suggested a snowball fight in their afternoon off. Eating with his newfound friends, he was introduced to Stope the grey goblin forgehand, and the quartet soon became fast friends. After Quint's promotion to Upper Hall squire, Raffix's to Knight Academic-in-waiting and Phin's to Academic-at-Arms, Raff saw more of Quint but less of Phin, but it was Phin who was instrumental to The Winter Knights' creation.
Clash of the Sky Galleons
It is not known what became of Raffix following the events of Clash of the Sky Galleons.
Since he was a Knight Academic, it can be assumed that he was eventually sent Stormchasing, and either died or became trapped in the Twilight Woods - as noted by Vilnix Pompolnius in Stormchaser, none of the Knight Academics after Garlinius Gernix ever returned from their quests for Stormphrax.