Korun Trebble is a talented data analyst. He was involved in the acquisition of the Death Star Plans in AX-235, although at the time had no idea of the significance of those limited technical specifications, or how important his role really was.
Since then he has plied his trade as an information gatherer, both as a field agent and intelligence officer, in countless operations for the Rebel Alliance.
To think, if the Empire hadn't taken away his commission due to simple regulatory errors, Korun Trebble might still be enamoured with Palpatine's New Order.

Absolute Power Corrupts Absolutely:
The galaxg abounds with examples of how power corrupts, and few are as guilty of this than the dark Empire. Korun's father has told him of the fall of the Republic; how the democratic process stagnated, how the Jedi Order and the Chancellor's Office fought for control, and how it turned the once kind-hearted and fair Palpatine into a suspicious and malevolent tyrant - leading the consolidated power of the galaxy's to be used for disasterous purposes.
Ultimately, Korun seeks to disrupt the Empire's ultimate authority and to encourage the distribution of power in a fairer manner.

My Friends are Counting on Me:
Korun works not only for himself and his world, but also his friends and family he has found in the Rebel Alliance who are threatened by the Galactic Empire. Therefore, drawing power from the weight of responsibility, Korun is driven to do whatever he can for the success of the mission. For if he were to give up, he would be giving up on everyone else.

Operation Planning - 5 Duty
Efficient use of resources is key to the success of the Rebel Alliance. Rebel strikes must be carefully oeganised to be as effective as possible, while consuming minimal supplies.
The Rebellion can tolerate few losses. Korun Trebble recognises this and takes it upon himself to ensure that each mission is engineeres for success, with nothing forgotten or wasted.