If you find certain Story Mode battles or optional missions too difficult, CyberConnect2 included a built-in safety net. Every single base-game character can be unlocked purely by accumulating (the in-game currency).
Here is a list of characters that can be unlocked in Naruto Ultimate Ninja Storm 4 Road to Boruto:
If you prefer not to play the story, you can unlock characters by buying them in the "Free Battle" character selection screen. If you find certain Story Mode battles or
Complete the specialized Road to Boruto story mode campaign, which centers on the Chunin Exams and the fight against Momoshiki. Unlocking Special Forms and Costumes
The most direct way to unlock characters and variations is by progressing through the main story chapters. You will unlock them upon completion, regardless of your battle rank. Key characters like (Berserk/Ten Tails), (The Last), and various Six Paths/Last versions of are unlocked by completing specific story chapters. Complete the specialized Road to Boruto story mode
Here’s a for Naruto Shippuden: Ultimate Ninja Storm 4 – Road to Boruto regarding the “Unlock All Characters” feature (typically a DLC or in-game purchase option):
Getting S-Ranks in the story mode helps ensure you unlock all associated items and characters quickly. Key characters like (Berserk/Ten Tails), (The Last), and
The Character Unlocker feature is designed to allow players to unlock all playable characters in "Naruto Ultimate Ninja Storm 4 Road to Boruto," including any DLC (Downloadable Content) characters, ensuring that the feature is verified to work with the "Road to Boruto" edition.
If you purchased the "Road to Boruto" expansion or the Season Pass, you have access to characters that cannot be unlocked through gameplay. They must be downloaded.
If you are interested, I can provide a detailed walkthrough for achieving S-Rank on specific boss battles. Let me know which characters you are struggling to unlock!