With the Views filter hook wpv_filter_query_post_process, You need create custom PHP function for it,
For example:
add_filter( 'wpv_filter_query_post_process', 'prefix_modify_empty_query', 10, 3 );
function prefix_modify_empty_query( $query, $view_settings, $view_id ) {
if ( $view_id == 123) { // if is the views 123
print_r($query->posts); // display all child posts
// create a loop to check if they are using same parent person posts, and remove the duplicate ones.
}
return $query;
}