Governor Mourel is a character that appears in the first level of Strife. He is the leader of the town the player starts off in, and owns his own mansion to the east of the tavern. He is a corrupt puppet of The Order, and is a reminder to the people of the town they are no longer free. As Blackbird also states "Calling Mourel sleaze is paying him a compliment. He's mongrel turd on a stick!"
Mourel can play two different roles in the game depending on the player's actions. His primary role is as a trader with the player after they meet Macil. Macil tells the player the Governor is the only one that can give you a pass to enter the prison, and that despite his allegiance to The Order that he loves making deals. When you talk to him about this, he'll give you an option of two tasks, one is 'messy', and the other 'bloody'.
The 'messy' task involves attempted trickery on Mourel's part, claiming a minion of his is tapping power from him, when in reality he is trying to trick you into destroying the power coupling that allows The Front to jam The Order's tracking on their base. The player could destroy the coupling and be forced to fend off a search team of Acolytes, or wisely avoid the first coupling and find a broken coupling to use as a false token for the Governor to give them the pass.
The 'bloody' task involves going to the Power Station and to its warehouse, where a corrupt minion of Mourel's known as Derwin is selling children to The Order without paying Mourel's share. Mourel tells you to kill him and bring his ear back for proof of the deed. The player must then go to the Power Station and kill Derwin, bringing his ear back for proof, and thereby gain the Prison Pass.
After getting the Prison Pass, the player can choose to kill Mourel for 50 gold that he drops upon death (this only happens when you've finished business with him, if you kill him before you get the Prison Pass, the alarm is triggered, and he'll drop nothing).
Mourel's other possible role is to serve as a 'dead end' as a punishment to the player for taking the wrong choice from Harris. If the player decides to trust Harris after taking the Offering Chalice from the Order Sanctuary, Harris will give the player a key to the Governor's mansion, and the Governor will reveal that the player was used as an unwitting pawn to raise his status in The Order, and will summon in a flood of Acolytes which will eventually kill the player. Mourel will not mention this to you if you do not take Harris's optional task until after getting the Prison Pass from him in the Registered Version.