The core main characters are natsu Lucy gray erza gajeel Wendy
I really think with the exception of Lucy the entire team natsu will become dragon slayers. I think acgnolia and Irene will eventually pass down their dragon slaying magic to gray and erza.
With the revelation of Irene being erza mother I don't think think it's hard to believe in some way she will inherit her dragon slaying.
The reason I think gray will inherit dragon slaying is for power purposes, natsu only barely awakened his demon powers so when he fully awakens his power gray won't have a chance. I think same goes for acgnolia won't have a chance, also with natsu power fully awakening he will slowly lose his sense of self. So at some point natsu is going to be the one that fairy tail needs to stop. I don't know exactly the circumstance this will occur, but I think acgnolia as the strongest dragon will give his power to gray to fight natsu as the strongest demon.
I really think with the exception of Lucy the entire team natsu will become dragon slayers. I think acgnolia and Irene will eventually pass down their dragon slaying magic to gray and erza.
With the revelation of Irene being erza mother I don't think think it's hard to believe in some way she will inherit her dragon slaying.
The reason I think gray will inherit dragon slaying is for power purposes, natsu only barely awakened his demon powers so when he fully awakens his power gray won't have a chance. I think same goes for acgnolia won't have a chance, also with natsu power fully awakening he will slowly lose his sense of self. So at some point natsu is going to be the one that fairy tail needs to stop. I don't know exactly the circumstance this will occur, but I think acgnolia as the strongest dragon will give his power to gray to fight natsu as the strongest demon.