Best Regards
By showing the roof of your top hat you send your best regards.
Giving your best regards is basically just tipping your hat and showing the roof of it.
ぎ
よろ
None
When you give your best regards you always yell YOLO (よろ) to the other person.
YOLO means "you only live once," so in a way that's a good way to give your best regards. At the very least, it's an interesting way.