Let's see how exactly you can unlock them all.
1. Yuma and Astral
Upon reaching stage 9 or higher in Duel World (DM), the missions for Yuma and Astral will be unlocked for you to complete, while starting the story of ZEXAL as well. After completing these missions, the character and the new world will be unlocked.
Missions:
- Use the 4th level monster card (s) 2 times in a duel.
- Complete all character unlock missions.
2. Bronk Stone
To unlock Bronk, you must first reach stage 6 of Yu-Gi-Oh! (ZEXAL) World. Then its mission list will be triggered, ready to be completed. This will unlock Bronk Stone and his default Deck.
Missions:
- Win 1 duel against Bronk Stone playing as Yuma and Astral
- Perform 3 Xyz Summons.
- Summon one or more Warrior-type monsters a total of 5 times.
- Complete all character unlock missions.
3. Tori Meadows
After Bronk, Tori's first requirement is to reach stage 9 of Yu-Gi-Oh! (ZEXAL) World. Likewise with our previous character, his mission requirements will open up. After you finish them all, Tori will be ready to use.
Missions:
- Win 1 Duel (s) against Tori Meadows in Duel World.
- Complete all character unlock missions.
4. Reginald «Shark» Kastle
Shark was unlockable during the “Shark Attack: the numbers appear! " event, therefore, it cannot be unlocked now because the event has already ended. He is sure to come back in the future one way or another, but there is no information available on that, as of yet.
5. Astral
Not released yet, but is mentioned for a future release. More information on this in the future.
There you have it, these are all the characters ZEXAL has to offer at the moment, but more will be on the way as the game progresses. 2021 started strong for Yu Gi Oh! Duel links, so stay tuned for more announcements.
