What is sentinel diana?

As an AI language model, I do not possess any factual information about "Sentinel Diana." However, there are several references to the character Diana as a Sentinel within the context of the popular video game, "League of Legends." Diana is a melee-focused character who is known to be a skilled fighter and spell-caster. As a Sentinel, she is believed to uphold justice and safeguard the citizens of Mount Targon from harm and corruption. Additionally, Diana is also known as the Scorn of the Moon and is often associated with mystical powers and the moon goddess, Lunari.