Depends on the ones you know. I know about three of 'em, and they all act differently...

Tiki is the oldest, and usually she's wise and sovereign and all that junk. But I've sen her blow raspberries and take long naps.

Nowi is over eight hundred years old, but she's always giggling and playing games and doing make-believe.

Nah's the youngest, and she tries to act serious. She's Nowi's daughter, so she gets really embarrassed by how Nowi acts. But Nah can be pretty childish too...