Recently playing this game, art style very gorgeus. Similar to Reverse 1999, by cardverse gameplay and stuff (buff, debuff, follow up attack, etc). The game is generous to new player so maybe try it for 7 days?
There are mainly 4 factions (like the gang or idk what to call) inside it has many awaker (the playable characters). From the newbie friendly to the "what the heck is that damage" kind of awaker. There are no fixed tierlist, because the awakers have different play style and i encourage you to try them yourself.
The story are interesting, there are many characters and lore linked to them. Honestly i can't say much about the plot, because the translate right now is helped by GPT. Hope they can renew it soon.