Depictions of the Four Saints in 3Houses:
Indech as a Hero w The Inexhaustible. Notably, he's the only one on a phoenix-drawn chariot.
Macuil as a Warlock w long hair, holding the Sword of Begalta. That Sword is linked to the Crest of Riegan, but you get it after defeating him in Claude's paralogue.
Cichol & Cethleann both as Bishops, they are always next to each other.
And then their dragon form
Macuil being a giant griffin is quite recognizable. The one at the front fits his misanthrope personality more than the praying one, and you can see a part of his long hair.
Despite those wings, the chubby body, short neck and round head undoubtedly belong to the Lord of the Lake. As for the different wings and tail...maybe Nabateans can transform in many ways...? (the wings could also be artistic liberty taken to ensure he fitted w the rest :>>> )
Cichol & Cethleann probably stand in the same order as the other two. They look remarkably similar on account of them being father-daughter, the only differences are the horns & legs. You can somewhat see Seteth's beard & Flayn's hair roll.
That said, the order can also be reversed... Macuil could have been a devout follower of Sothis & Indech could have been shown in a manner aligning w his Hero class.
Cethleann could be the dainty one w hooves(?) & Cichol could have been the fierce one w sharp claws.