What is the primary role of a guardian named in a will?

The primary role of a guardian named in a will is to take care of minor children or dependents after the parent's death. This function is essential because, in the absence of a living parent or legal custodian, the guardian assumes responsibility for the physical and emotional well-being of the children.

In this context, the appointment of a guardian in a will ensures that the testator's wishes regarding the care of their children or dependents are honored. The guardian is typically someone the parents trusted to provide a stable and nurturing environment, reflecting the parents' values and intentions for their children's upbringing.

The other roles mentioned in the options pertain to different aspects of estate management and probate proceedings. Managing the financial assets of the estate is generally the responsibility of the executor or personal representative, not the guardian. A guardian does not act as a proxy for the executor; instead, they focus on the welfare of the dependents. Finally, ensuring the validity of the will falls within the duties of the court and the executor, not the guardian. Thus, the correct answer highlights the guardian's primary responsibility to care for the minors or dependents designated in the will.