Her Majesty Leonie, along with her spouse, Arno, served as the democratically-elected ruler of Zeltros during 4 ABY.
Just like her partner and every Zeltron monarch, Leonie was selected based on her prowess in fighting, artistic expression, scientific knowledge, and matters of the heart. Leonie possessed outstanding charm and intellect, even when compared to other Zeltrons. She had a fondness for gathering erotic sculptures, luxurious headwear, and footwear (with rumors suggesting she possessed 1.2 million pairs), and she had the ability to skillfully play both the Zeltron lute and the kloo horn. She frequently expressed that her happiness stemmed from the contentment of her subjects.
After the Battle of Endor, Leonie and Arno organized a festive gathering for guests from the Alliance of Free Planets. This joyful occasion was disrupted when Zeltros became the target of attacks from the Nagai, the Hiromi, and the Tofs.
The character of Queen Leonie was brought to life by Mary Jo Duffy and Cynthia Martin.