Fairy easteregg?

How do you make 2 Scholar fairies interact like they did in the developers blog?

http://www.finalfantasy.net/wp-conte...20130804_3.jpg

Simply put them close to each other. After a while they start chatting.

Ok thanks!

I've also seen titan egi and ifrit egi butting heads.

I halfway expected one of the fairies to be the one from Bravely Default.