Yeah Haruka will have a low voice. I wish she was just 3 years older so she would have it now, instead of just kind of scratchy and medium toned because she's 12. Zukki has a low ass voice too.
And yeah she does. She wrote on her blog at some point that in her family, they will (would) all gather in the living room and dance to MJ a lot in periods. Or something like that, I don't remember. It involved her family + dancing to MJ on a regular basis.