The main phase of B rank is the same as the previous ones - there's no new mechanic, and all the previously implemented stay the same. You still have to make a 3-man squad and have to collect the highest amount of Battle Orbs. During the final round remember to collect awakening and ultimate jutsu orbs and prevent the enemy from doing it.
After you've defeated the enemies, you will, as always, have to sit through a series of cutscenes, after which you will be able to pick up your reward:
- Character: Kushina Uzumaki
- Accessory: Ino Mascot + Hinata Mascot
- 50,000 ryo
The choice, as always, is yours - although there's really no point in taking the character reward, as all of the fighters in the game unlocks with money (ryo) gain, meaning that you will unlock the character sooner or later. The best choice is money, or, if you want, the accessory set. If you, however, want to gain access to the new character as soon as possible, you can take the first reward.
Afterwards, you will see a series of cutscenes, and you will be transferred back to the main menu. You've unlocked the A Rank ninja tournament, as well as have gained access to Rank B Challenges (you can start them at B Rank Tournament Reception). Go to the next chapter to continue your journey with the ninja tournament.