What if Ardyn had begun injecting Prompto with daemon blood when he held him captive -- knowing where Prompto comes from he decides to force Prompto to accept what he was born for

I want this to remain purely platonic and brotherly among the chocobros.

Bonus: When the three find Prompto his eyes have already begun to change to red and they discover what he is before Prompto has a chance to reveal his secret