After six years, Dorothy becomes the most important figure of Kaldea, the one who protects the Empire with her power and polices with her authority.
She took care and entrusted Inga when all condemn him because of his familiar problems and helped Kai and Elisa to learn how to control their magic power. After that short period, she sent them in a journey in order to find Babbo's lost memories, together with this last one. She hasn't changed her character, in fact, she's always full of herself and cynical as six years before, but she developped a big part of sweetness and a big maternal affection for Inga. This is a u-turn for her personal maturation, because she's more human and warm with the persons she loves.
It seems that she was in contact with Nanashi and Alviss, mainly with the first one, to whom she promised a gratification in exchange of helping them. It's her who give to Elisa the ÄRM Fiore, with which she can help her companions.