I’ve seen people complaining Kai being too goofy in DR, but, honestly, after seeing the Monstrosity trailer, it makes sense.
We know Kai, he’s always trying to seem fine, tries to make sure no one’s worrying about him. He’s just been through hell and he knows his siblings have gone through it too. He’s overcompensating. He’s worried that if he tries to be serious for one moment, the facade will break.
And maybe he’s trying to fill the space of Jay for Nya.
Idk, this is just how I see it.