Friendly Arena is a Third Sea PvP arena designed specifically for Friendly PvP battles. It serves as a dedicated dueling area where players can fight each other without engaging in normal open-world combat, making it useful for practice and casual matches.

The arena is located on Hydra Island, on the opposite side of the waterfall. Its function is very similar to the Colosseum in the Second Sea, acting as a structured space for organized duels.

The arena features two platforms positioned at opposite ends. These platforms glow light green when a player stands on them. Once both platforms are occupied by two players, a Friendly PvP match automatically begins.