I'm a little confused. Did that particular ghost have any specific relation to the bracelet or the granny? I know his aura was strong so being near him caused it to explode. But did he follow her just because of the friend or because of the granny/where they were going? And why did the friends bracelet only blow up at the end when granny whipped out her super bracelet? And did he go back after the bracelets were gone or just eventually he wandered off?