HistoryDorinn was a fighter of renown within the Dragonborn clan but when the time came to travel with one of his heroes, Drakonis, he jumped at the chance. Show spoiler
The first and only mission Dorinn had with Kava and her crew was to retrieve the Bell of Vecna from its ages old hiding place near Odysia. Dorinn had little patience for Drakonis and his addiction and frequently lashed out at the elder Dragonborn for his failings. They were able to recover the artifact and delivered it safely to the buyer in Esterholt.