Here is the full list of all 31 Fairy Knights achievements.
Have seen the ending of the game!
Water wizard!
Defeated Taringus!
Wind magic earned!
Forest magic earned!
Earth wizard!
About Aru!
Have revived!
Earth magic earned!
Fire wizard!
1st weapon upgraded!
Perfect warrior!!
Fire magic earned!
Elisa joined the party!
1st Item bought!
1st Skill level up!
4 Combo!
5 Combo!
3 Combo!
1st Level up!
Wow! Several Combo!
A beginning of the journey.
Earned a weapon!
Digi joined the party!
1st battle completed!
First magic!
2 Combo!
Earned the legendary sword!
Full level warrior!
Forest wizard!
Wind wizard!