Hello. When i dwonload newest beta, i notice 2 additional slots in fight panel. Where i can recruit these characters?

Unless you mean the DLC where you can recruit Chambara,Mesphit, Sauzer and Trouble, there are no other hidden characters. The beta has a different party setup system, removed the drag & drop since wasn't working well anymore, so there are more slots to arrange your party members but no extra characters.

Ok, thanks for quick response And one more things. Those wallpapers are little tricky. There is a Jul among playable characters :D