The lady in red

This lady is Mary Magdalene; yes, the wife of Jesus (according to the theory behind the Da Vinci Code book anyway). She is seen her in glass at Alrewas Church.
Identifying people in church stained glass windows is often just a matter of knowing the, er, code – or symbols anyway. St Peter always carries a key for example.
And the reason that we know that this lady is Mary Magdalen is the red hair. Mary was (by another legend) a reformed prostitute, and as red is a symbol of sensuality… Mary got red hair.

I hesitate to think what the real Mary Magdalen would have thought of all these stories about her.

Link: Magdalene (wikipedia)