So to be clear, it would be dada that changes to akina dada? So the sentence as a whole would be "Habari za jioni akina dada"?
Is it uncommonly used as a form of address, like it probably would be in English, or in general? Because in English at least, you can use it quite easily in a sentence like "I have two sisters". Would that also use akina dada?
From the discussion here, I understand that "Habari za jioni dada?" is a question asking the sister how her evening was, but I had this in the form of word tiles. The given tiles were: Good, work, teaching, night, evening, sister and will. I couldn't make a question from those choices, so I guessed at "Good evening sister" and it was marked as correct.