

Once on each of your turns, when 1 or more cards leave your EX area, put X Fairy tokens into your EX area. X equals the number of cards that left your EX area.
QI have this follower on my field. If I play a Heartless Battle, transforming 2 Puppets in my EX area into a Lloyd token and a Victoria token, does this follower's automatic ability trigger?
AYes, it does.
Transforming cards means banishing them and creating the same number of specified tokens in their place. Since the 2 Puppets would leave your EX area when banished, this follower's automatic ability would trigger, putting 2 Fairy tokens into your EX area.
QIf I play a Fairy from my EX area, does this follower's automatic ability trigger?
AYes, it does.