What does duty of the court signify in the process explained above by Marshall?

The whole point of a written Constitution, Marshall asserted, was to ensure that government stayed within its prescribed limits: “The powers of the Legislature are defined and limited; and [so] that those limits may not be mistaken or forgotten, the Constitution is written.”

Explanation:

a countries leader should be motivated by the common good of the country.

the three roles stated in the dialogue develop the siblings' personalities.

lloyd's personality looks like a trademarketer

dana's personality is afraid from lloyd's behavior and the oldest sister is a decided person who tries to solve any conflict