Mental and physical changes have happened to her. As the queen, she bears a LOT of responsibilities. So after the whole war/battle, she changed many things about her kingdom. She changed its location aka she literally teleported her entire kingdom to another location. She doesn't want to stray too far from Gwam and Puddinland though but it's a good distance with some natural defenses along with her upgraded BARRIER. She also hired many new guards that she made absolute sure were going to be loyal and opened up more trading with other kingdoms. Essentially making her kingdom recover and grow larger and more powerful in both military and in agriculture. She's also training herself to properly handle things and is planning on making a special group aka bodyguards for her kids and herself.
Also. She regrets making a council after seeing what happened to hers and remembering what her friend's council did to her friend. So, she is now the SOLE person who checks on EVERYTHING. The temporary queen when Mina is out saving the world and such is Hana/Athena. The true heir is Momo and the heir in case Momo dies suddenly too is Joss who has agreed to go through an aging process and willingly wants to train harder to protect his family. He and Seraphina have been catching up quite well and she's being taught how to fight. Maya too who has been saved is currently training her element and Mina plans to enroll her into Terra Unity Academy.
Okaaaaaaay way too long talking about all this lol.