Queen Joanna and Charles V had somewhat of a strained relationship during his tenure as dauphin because of his infidelity with Biette de Cassinel, but their relationship improved when after he became King, and reportedly, he sometime confided in her in political and cultural issues and relied on her advice.
Ratu Jeanne dan Charles V memiliki hubungan yang tidak akur selama masa jabatannya sebagai dauphin karena perselingkuhan dengan Biette de Casinel, namun hubungan mereka membaik setelah ia menjadi Raja, dan kabarnya, Charles kadang-kadang mempercayakannya di dalam politik dan isu-isu budaya serta mengandalkan sarannya.