Itachi Uchiha is undoubtedly one of the best side characters in both Naruto and ... of the series as a villain and the representative of Sasuke's revenge, he's later revealed to be a protector ...

Naruto's focus shifted to Sasuke, neglecting side characters. Sasuke's control, power, and cold demeanor set him apart from Naruto. Sasuke's selfish manipulation of others highlights his dark journey.