Placed at the extreme south of the pase, this warrior armed with armor holds in his right hand a staff which on top of it stands a bronze ensign. The ensign represents the Raza Viscontea, the sun symbol of the Visconti that is replicated also in the rose window in the central part of the apse.
In it’s center there is represented a bird, maybe an eagle, symbol of the imperial vicariate: a symbol that is equated to the visconto python by allowance by Venceslao, emperor of the Roman Empire, when he crowned Gian Galeazzo Visconti first duke of Milan. Whatever the true meaning may be, this soldier serves the Visconti.
He has the task to protect the cathedral and the city of his duke, ready to give alarm when an enemy will move to Milan
By then, maybe, all the 2.300 statues will come to life, the bronze doors will close and from the spires the 135 saints, warriors and martyrs will come down to create a shield made of stone. Because only the hardness of the marble and the stillness of memory work as a shield against any enemy

The tales of the statue in the Dome’s building site:

 The warrior with the ensign is a reproduction of which neither the author nor date of creation are known. We know instead, that the original was realized in the distant 1659 by Giuseppe Vismara, famous sculptor of his time. We do not know who could the statue represent also because in the files a name is never stated, in fact! The statue is always referred to as “soldier”.