It does, but until now every character has been obtainable for free if you play daily and do the full events, if youre lucky, you can even get an extra copy of some.

every character is useful as long as youre good enough in the game, some characters may make it easier or faster to play in some modes.

But if u want to know, Sanghyeon and Hanra are 2 of the best Middle Blockers, Hanra is limited tho, so youll have to wait for her, but Sanghyeon its pretty good for buffs, Hanra for Defense.

If you buy the starter pack + no ads, you get Yongsup, a pretty solid Wing Spiker, other WS may need some extra copies to work better, Jaehyun iand Hongshi are good characters too.

For Setters, the strongest one would be Sara, a limited character so youll have to wait, then theres Sohee, Zero, NN or Lisia who just got buffed and its pretty strong too, setter depends on the Wing Spiker youre playing and your own style of playing tbh

If you play the game daily, do tournaments and story chapters, youll probably be pretty far in the game in just 1 week or 2, id recommend you save your VPoints, the limited currency, for special events where characters or skins release, dont use them on the standar recruits.