Anna Ferrara is a retired Venezian Witch that makes a living training younger witches. She has lent her instruction to Mio, Yoshika, Perrine and Lynne.
She was part of Venezian military even before the Neuroi War I and fought against the Neuroi before the introduction of Striker Unit. Therefore she is the one of few Witches who still can fly with brooms in the 1940's. Now, she teaches younger Witches how to fly with brooms to let them train their magic control ability.
Although she is definitely past 20 in age, Anna still retains her magical power just like the Miyafuji family. However, she does not have any other special abilities like the healing magic of Miyafuji family. This suggests that her magical ability is the act of flying itself.
She is based on the Italian WWI fighter pilot Arturo Ferrarin, who received medals and fame outside of Italy after setting a long distance non-stop flight world record. He died in 1941, when a prototype aircraft he was test-flying crashed.
(Source: Wikipedia)