They will keep staying together to fulfill their vow to the prince.
Ability / Effect
You may only cast this card during an attack on your opponent's turn, and if a 《Legend Dragon》 is on your field. [Counter] Nullify that attack. Then, if a 《Dragod》 is on your field, put the top two cards of your deck into your gauge, and you gain 2 life. Then, if two or more 《Dragod》 are on your field, draw a card, and this card cannot be nullified.