I have been thinking about this since the thread was posted. And I have enjoyed reading all the responses. Ok here's mine.
Ikaika: He could be two things. A private investigator. He likes to sneak around and be in the background, but loves to find things. And a personal body guard. Because he is mommy's protection and does a great job scarying possible intruders.
Mailani: She too can be two things. A doctor, she loves people, especially kids. She seems to be in touch with how everyone is feeling. And she has to be in everyone's business, so a reporter is the second one (gossip columnist).