Each Miraculous user has a choice, when they first get their miraculous. Sometimes Kwami Guardians make mistakes.
Evil? Or good? This is the choice Fei must make when she is gifted with the power of Destruction. Will she become a protector of Paris? Or will she lead it to ruin and despair?
And what of Hugo's choice? When confronted with misfortune in his duties as Master Fu's successor, can he fix his mistakes? Or will he be swallowed by the chaos that ensues? Did he make the right choice with the girl of his dreams? Or will that choice undue him?
And what of the Kwami's will? Is it free? Or tied to the master they serve? Can a Kwami go against their master? Can a Kwami disobey an order given? Will a Kwami ever take over a master? Or will they be forever the servant, forever the slave?
Is it possible for a Ladybug to refuse the path of righteousness? Or will a Ladybug forever be good? With the power of creation, is seems to be so, but with Mya's inner turmoil, she could very well become her own worst enemy. Can she fend off her demons? Can she make her mother proud? Will she be the Lady of Luck? Or fall into Miss Fortune?
What of the Moth, one might ask? Will the next be as dark as the last? Or will he bring the name of Hawkmoth back to the roster of Heroes? Or will his rival's antics drive him into despair? Will his title of the last of the Nido clan bring him turmoil? Will he bring honor to his family? Or will the poor Karma never gain rest? Will he walk the path of Light like his heroes? Or the path of Dark set by his predecessors?
Will the Fox stay dormant? Or will it once again see the light of day? Will the goings on of the heroes, both past and present, give the power of Discord fuel? Or drain it to no end? Will it's children finally find rest in sleeping souls? Or will they awaken to serve again? Will the creature sleeping within destroy the Kodex?
Only time will tell.