Crowned Knight: From The Ashes

Set in the later seasons of Crowned Knight, a mysterious hijacker seizes an international television broadcast and claims to be the rerisen Phoenix, a powerful and ancient God said to be entirely made of flame. Dismissed by the general public and nobles as nothing but a fraud, the supposed god retaliates by performing a show of her unearthly magical ability, while also threatening to "purify" and conquer any kingdom that crosses her path.
With this powerful threat looming over them, Luke, Jeremy, and Princess Adelais must find a way to save the kingdoms from the Pheonix's wrath while also dealing with the problems of their personal lives.