Sash Lilac, also known as Lilac the Dragon, is the main protagonist of the Freedom Planet series. She is a hybrid water dragon of concurrently unknown origins, who is believed to be the last of her kind. Before hatching from her egg, Lilac was stolen from her parents by Spade, who stole her egg as a test to get into an underground street gang known as the Red Scarves. As a result, she was raised by the Scarves after hatching, and would undergo training in martial arts and thievery. Not agreeing with the guild's lifestyle, along with learning the truth of her egg being stolen, she left to live independently and find her place in life. Since then, she and her best friend Carol have been living in a hidden treehouse deep in the forests of Avalice's Valley Region, stealing from the rich to survive.

After saving Torque, a stranger who crash-landed in Dragon Valley during one of her raids, Lilac, along with Carol and her new friend Milla, would quickly find themselves involved in a large-scale conflict that would affect Avalice as a whole. Together, the newly formed Team Lilac would take on the task of defeating Lord Brevon, an alien warlord who intended to power his army and resume his galactic conquest by stealing the planet's main (and only) source of energy: the Kingdom Stone. Along the way, she deals with the distrust and deception of every party involved, but eventually unites them all for an all-out attack, resulting in Brevon's defeat. While Lilac was not able to save the Kingdom Stone or prevent Brevon from escaping, Avalice and its inhabitants were given another chance, thanks to the Kingdom Stone's transformation.

Three years later, Lilac and her friends are summoned by the Royal Magister and recruited for the mission of defending Shant Tu from increasing robot attacks, including those from the remnants of Lord Brevon's army. Eventually, she would meet the ringleader of the attacks: Merga, a water dragon warrior from ancient times, who seeks to awaken the ancient starship Bakunawa and expose dark secrets in an act of vengeance against the Magister and the earth dragons. Despite the revelations of the past, as well as the tensions caused by distrust and betrayal, Lilac and her friends manage to defeat Merga and stop Bakunawa. After the fall of Bakunawa, Lilac heads out on her own to search for the missing Merga, wanting to learn more about the water dragons, and possibly her parents.