It is important for each person to fulfill their role.

Watching a movie alone is enjoyable.

I went to see a movie by myself.

He is still a child, and it is difficult for him to understand the adult world.

The dwarf was living alone in the forest.

He is a narrow-minded person, so he can't be happy for others' success.

He was the person inside that kigurumi costume.

In this museum, the entrance fee varies according to three age categories: adults, middle-aged, and children.

He is living a simple life.

The forest is quiet.