Derran Takkar was a male Human Imperial Moff, appointed to that position by Emperor Palpatine just before the Battle of Endor. In the many years of retreat, however, he lost control of his sector.
He organized a group of former Imperials to try and sabotage the wedding of Jedi Master Luke Skywalker and former Emperor's Hand Mara Jade.
Derran Takkar was a male Human who served the Galactic Empire as a Moff. Shortly after the signing of the Pellaeon–Gavrisom Treaty, Takkar was a refugee on the planet Dolis 3 with his wife, Anlys, and a small group of followers. Angered both personally and politically by the situation, he got into the palace in an Ithorian uniform through the tunnels and threatened that he would send a virus to the New Republic computer network through the use of a dead man's switch; however, he had a change of heart after Skywalker convinced him to stand down.
Takkar at the wedding of Luke Skywalker and Mara Jade.
After he had calmed down, Takkar observed that Skywalker could have simply kept the switch depressed with the Force while Takkar was subdued. He was curious why Skywalker had instead chosen to reason with him. Takkar accepted his invitation to the wedding and defected to the New Republic. As it turned out, the virus he had threatened to use would not have worked anyways, since security measures against that specific danger had been in place for years.
- The Complete Star Wars Encyclopedia