Here is the full list of all 23 Cast of the Seven Godsends - Redux trophies - there are 8 bronze, 7 silver, 7 gold and 1 platinum.
Unlock all other trophies
Finish the game at Retrogamer difficult level
Kill the third mid level boss
Finish the game with the fire armor
Reach level 7
Get the black armor
Finish the game with the earth armor
Kill Numanir the priest
Kill Lord Adomon
Kill Antirad once for all
Kill the fifth level boss
Kill the fourth level boss
Get the fire armor
Kill the third level boss
Get the earth armor
Get the wind armor
Kill the second level boss
Get the plagues armor
Kill the first level boss
Get the lightning armor
Use every weapon in a round
Get the ice armor
Kill the mage once for all