Sizzik Thor grew up on his home world, Li-Toran, in a typical manner until he reached adolescence. Where most Melitto had the ability to sense their surroundings with cilia, Sizzik was able to sense more than just scents and magnetic fields; He was able to sense inside objects and other living things. It came as a surprise when he found out that not all of his kind was able to do the same. To capitalize on his enhanced abilities, Sizzik decided to try and teach other Melitto how to emulate his ability. This led to disaster as he ended up causing others pain and to also lose control of themselves and lash out in anger. Being deemed a threat to his hive, Sizzik was exiled. Dejected, Sizzik briefly joined a ronin clan of males. There he honed his ability without letting the other know about it, and found he could influence positive emotions in others as well and encourage them with his words.

The ronin group decided to leave Li-Toran to survive, and Sizzik Thor went with them gladly. The group did mercenary work for a time, and had marginal success. Eventually, their work led them to the Inner Core and to Coruscant specifically. Continuing to take on mercenary work, the ronin would relax after missions on the cheaper levels of the city planet. Sizzik often found himself wandering around the level, reaching out to the other sentients with his ability. Sometimes he would resolve conflicts by improving moods, while other times he would see if he could anger the right sentient to enact justice. The most impactful moments where when he found himself coming out of a stupor, standing in front of the same poster - a recruitment advertisement for the Republic Navy. Perhaps it was a longing for his people's eusocial society, or the desire to travel and see new locations without the struggle of being a ronin Melitto, but Sizzik couldn't deny he was tempted to explore the option of joining.

When it appeared the ronin group was beginning to fail, after suffering some losses over time, Sizzik Thor decided to leave on his own terms and bade farewell to his kin. He used his ability to improve moods to soothe over anyone that would protest him leaving, and tried to convince the survivors to find a better life for themselves as well.

Even though the poster was old, the Republic Navy was still recruiting when Sizzik finally located a recruitment office. They tested him and found he had a great intellect and aptitude for leadership. Instead of joining the rank and file of the Navy, Sizzik was commissioned to become an officer of the Republic Navy.

Now Sizzik serves the Republic and commands a small corvette.