Leona is a 20 years old maid from the Bloodcurse Mansion and is a normal human. Like other mansions there is also a head maid and her name is Noelle Amore at this mansion and Leona is working for her. She is known for being a kind hearted person and does her job always with positive thoughts. Leona can be like a mother to the composer Musica Pianisima, while the other maids avoiding Musica since her aggressive side, is Leona the only maid who knows what to do to calm her down.
One of the maids of the Bloodcurse Mansion, a motherly person who takes care about Musica and a trusted person by the other maids and members of the mansion let her having a good reputation. The Bloodcurse Mansion is in a kind of second Gensokyo that was once a part of the other Gensokyo.