Here is the full list of all 47 BLACK CLOVER: QUARTET KNIGHTS achievements.
Unlock all Achievements
Win a ranked Online Battle match while using Vanessa.
Win a ranked Online Battle match while using Mimosa.
Win a ranked Online Battle match while using Yami (Young Ver.)
DLC Achievement 9 Description
Win a ranked Online Battle match while using Julius.
Win a ranked Online Battle match while using Gauche.
Win a ranked Online Battle match while using Fana.
Win a ranked Online Battle match while using Magna.
Win a ranked Online Battle match while using Luck.
Clear all Story and Challenge Missions
Win 10 Online Battle Ranked Matches.
Win a ranked Online Battle match while using Asta.
Win a ranked Online Battle match while using Noelle.
Win a ranked Online Battle match while using Vetto.
Trained in Mock Battle for a while
Clear all Challenge episodes
Clear another Story
Clear the Story
Win a ranked Online Battle match while using Klaus.
First Magic Knight Rank Up
Win a ranked Online Battle match while using Yuno.
Win a ranked Online Battle match while using Mars.
Clear all Mission challenges in Julius's Challenge Episode.
Clear the Julius Challenge Episode.
Clear the Charlotte Challenge Episode.
Clear all Mission challenges in Charlotte's Challenge Episode.
DLC Achievement 7 Description
DLC Achievement 8 Description
Win a ranked Online Battle match while using Charmy.
Win a ranked Online Battle match while using Licht.
Win a ranked Online Battle match while using Charlotte.
First time getting a Team Relic
Got a Magic Key in Treasure Hunt
Used a voice line online for the first time
Played first Online Battle
Win a ranked Online Battle match while using Yami.
First Player Icon change
First Film change
First Title change
First Voice change
Participated in Zone Control
Participated in Crystal Carry
Checked Magic Details for the first time
First Film use
First Outfit change
First Relic use