Here is the full list of all 21 Fairy Light achievements.
Die more than 10 times for Elsa.
To die more than 10 times for Jerar.
Reflecting 100 monster shots shield Erza.
Complete the game on both difficulty levels.
Find all the treasures on any level.
Use each type of potion 10 times.
Find 5 stashes.
Collect 1000 coins.
Collect 100 coins.
Collect 10 coins.
Fall into the abyss or die because of traps 10 times.
Complete the whole story.
Watch the captions to the end.
Find the 10 swords of Elsa.
Use Elsa's cake for resurrection.
Find the top secret zone.
Pick up 10 Potions.
Use Invulnerability Potion.
Make the first purchase in the store.
Enter the game more than 20 times.
Defeat the boss Elsa without receiving damage from flying swords at the 1st stage.