Comparison guide
Easiest vs hardest Anime Wordle series
The easiest series teach clean clue separation quickly. The hardest series teach you how to deal with overlap, which is useful once you already understand the board and want to improve your accuracy under pressure.
Easiest series
These are good for learning because they stay compact enough to memorize while still showing the clue patterns you need in mixed mode.
Hunter x HunterMy Hero AcademiaFairy Tail
Hardest series
These are best once you already know the basics, because they reward you for separating similar characters inside crowded franchise pools.
NarutoDemon SlayerOne Piece