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