The Good Witch Of The West (2006)
Original title: 西の善き魔女 Astraea Testament
The Good Witch Of The West is a 2006 Japanese-language animation series. It stars Mamiko Noto, Jouji Nakata and Akira Ishida.
On Filiel's 15th birthday, she received her mother's necklace as a memento from her obstinate astronomer father. Her common and tedious life was turned into a life of conspiracies. With her new life, many adventures await.
Official site
http://www.imagicatv.jp/content/project-westwitch/index.html