What was the role of Charles V in the spread of Protestantism?

Question

What was the role of Charles V in the spread of Protestantism?

Answer 1

He was the Catholic ruler of the Holy Roman Empire. Hopefully he didn't encourage it, since he was meant to be Catholic and all

Answer 2

Of Spain? I thought he was Catholic cause Mary I of England was betrothed to him for a long time. Instead she married his son who was Catholic.

You could say that his son married the Catholic Mary of England. The English people despised the Spainiards and therefore found a reason to justify their Protestantism.