Prudence is one of Zev's very closest friends, and the two have saved each other's lives many, many times. Zev will not tolerate anyone mistreating Prudence, and Prudence treats Zev with much of the same protective instinct. Most think that Prudence just sits on the sidelines at Zev's battles - However, Prudence is just as dangerous as Zev, and is actually a stronger Mage than he is.