(Welcome the Progeny of the Fire Dragon God!)
(We pay our respects to the supreme leader!)
After the initial group of dragons recognized the progenitor's soul from Vaan and welcomed him, the rest of the dragons in the area also followed suit.
They weren't stupid.
There was only one reason why they could sense the Fire Dragon God, their progenitor's soul from the human; that person conquered the Trial by Fire and inherited the Fire Dragon God's legacy.
Although the Fire Dragon God's inheritance fell into the hands of a human, they did not feel the slightest aversion, dislike, envy, or any negative emotions, for that matter.
They only felt respect and reverence.
The fact that this human could pass the fourth stage, which none of the Peak Lords could, let alone the fifth stage, showed that he possessed peerless talent and potential, surpassing the entire clan.
That alone was worthy of their respect.