Death is something that instills fear in everyone, even the bravest heroes who dare to sacrifice for others.
6. Takemichi - Tokyo Revengers

Takemichi stands out as one of the quirkiest main characters in the anime world. He lacks talent and courage as one might expect. Often seen crying and constantly fearful while navigating through the gangster world. However, his fear is overshadowed by compassion and a sense of responsibility - Takemichi is willing to do anything for his friends.
Alongside Mikey and Draken, Takemichi plays a crucial role in every battle and delves deeper into dangerous situations. He still fears death, but he also fears the pain his friends might endure.
7. Alphonse Elric - Fullmetal Alchemist: Brotherhood

After failing to revive his mother, Edward had to bind his younger brother's soul to a suit of armor. Alphonse's body was sacrificed to preserve what little hope remained. Being nothing more than a heap of steel, Alphonse is nearly impervious to attacks on his body and utilizes metal to aid in combat.
Alphonse gradually loses the small things that make him 'human.' He no longer needs to eat or sleep, and seems to no longer live as a human being. The Elric's younger brother begins to fear death before he can experience being human again.
Raito Yagami - Death Note

Hero, anti-hero, or villain? Raito can play all three roles, and which one he is depends on the viewer's interpretation. This young genius shows no fear in accepting L's challenge and then spectacularly defeating L. Raito used the Death Note and his exceptional intelligence to dominate the world.
Raito doesn't hesitate to take the lives of others if he deems it necessary to make the world cleaner. However, when facing his own death, Raito becomes incredibly pitiful and remorseful. He begs Ryuk in his final moments to spare him. Like many others, Raito doesn't want to die.
Usopp - One Piece

Usopp is an indispensable member of the Straw Hat crew, yet he's also infamous for being the biggest coward. He possesses the skills of a marksman, but courage is lacking. Usopp often flees from battle when he feels overmatched and leaves his comrades to continue fighting.
Usopp's greatest goal is survival; his actions are simply driven by fear of death. He lacks confidence and believes himself to be a burden to his teammates. However, Usopp has matured over time and overcome his fears. As a result, he has become somewhat trusted by Luffy and Zoro.