Hi @velograph
From the relationship field, you can get the selected people. Then you can loop through these people and render what ever info you would like, this can include a custom field value from that person. Here is an example:
<?php
// get selected people
$people = get_field('relationship_field_name');
if( $people )
{
foreach( $people as $person )
{
?>
<h3><?php echo get_the_title( $person->ID ); ?></h3>
<p>Custom field from person: <?php the_field('field_name', $person); ?>
<?php
}
}
?>
Thanks
E