But didn't the trained prince have mental health problems after knowing the youngest arrival?
the decline came for the abrupt change of environment inside the castle.
He was a kid whom childhood was stippred away within seconds of being born, grew up been call "the future and ONLY king", gave up on his own desires/dreams/infance to live up to OTHERS expectations about him. Just for his dad to fall in love with a person young enough to be his sister, get her pregnant AND throw him out the windows to make space for the new child.
It's better if the people at the castle FIRST help him go back to his old self, SECOND the 2 sibling have a chat with the dad, AND LAST explain him the situation with the new baby. The trained prince entire life was built around becoming the king, so he needs time and patience to adjust to his new reality if the bird people wants the NEWBORN to be the king now.
Also, Kluluk doesn't seem to want to be away for kouichi and klaus, so we'll see if he ends up running away or giving up the throne to be with them.
Ok
bro, letting kouichi and klaus keep kluluk wasn't that hard, you ALREADY have a trained prince whom was promised the throne for 2 decades. BFFR!!!!! that kid didn't wanna go, and I'm sure he'll runaway