W.I.T.C.H.

This is the manga adaptation of the Italian comic book with the same name:

This is the story of five teenage girls who are chosen to be the new Guardians of Kandrakar, who protect the center of the universe from people and creatures who wish to cause harm to it. For this purpose, they have been given powers over the five elements. The new guardians are Will, Irma, Taranee, Cornelia and Hay Lin, whose initials form the title acronym W.I.T.C.H.

(Source: Wikipedia)