What is the primary responsibility of the Sentry as outlined in the Second Order?

The primary responsibility of the Sentry as outlined in the Second Order is to always be on alert and observe everything. This emphasizes the fundamental role of a sentry in maintaining security and vigilance. Being observant allows the sentry to detect potential threats, unauthorized individuals, or any unusual activity that could compromise safety. This role is essential in ensuring the overall effectiveness of security operations, as constant vigilance is crucial for preventing incidents before they escalate.

In this context, while remaining alert and observing everything encompasses a broader duty that includes reporting and following orders, it is the foundation of the sentry's responsibilities. The other options, while they represent important aspects of a sentry's duties, either describe specific actions that stem from being vigilant or focus on procedural adherence, rather than encapsulating the core essence of the Sentry's main role.