Yuna is just your average schoolgirl. She may be clumsy or annoying but she always makes up for it with her charming looks and cheerful personality.
She lives with her family in Neo Tokyo, which according to a completely unnecessary backstory, was built in Yokohama after the original Tokyo was destroyed in a war.
Her idol singer debut began when she entered a pageant to become a "Galaxy Fraulein", whatever that is. Little did she know she was destined to become both a galactic princess warrior AND an idol singer!