She is Keiichiro's little sister, she died in a accident three years ago. She likes the Italians white sunflower.

In 2039, helper androids are widespread as general purpose electronics. 
Keiichiro lost his family in a traffic accident and retired from his band. One day, he finds an old model android in a garbage dump. He takes her home but after taking her to a repair shop he was told she couldn't be repaired so he planned to throw her away, but the next day he finds her making breakfast for him. Thus begin the summer days of a memory less android and a dreamless boy. 
Kowarekake no Orgel was originally an independent animation released as an OVA. Later on it received a theatrical release that is a bit different and longer than the original.

The story centers around Keiichirou, a young man who lives alone in his house. He went through a lot of pain in his life, ever since an accident that happened three years ago. 
One rainy day, he finds a little girl, drenched from the rain, inside his home. She is named Flower, and so begins the life for these two unlikely protagonists.

Noriko Kawada