Tidemother

The Tidemother is a being worshiped by the tidesages of Kul Tiras. Most people on Kul Tiras look to the seas for guidance the same way others look to the Light, but the tidesages have a much deeper connection with the water. The Kul Tirans have always survived primarily on their wits and bravery, for while the Light rewards conviction, the ocean demands activity. Long have the tidesages listened to the sea to guide their ships and their people, gentle whispers imperceptible to most. But in recent times, the voices changed, becoming demanding and even violent. This led to the corruption of Lord Stormsong, the Tidesage Council and many other followers, and their fall to the Void.

The magical wards — the Tidemother's Wrath, Pride, and Radiance — that guard the Shrine of the Storm were said to be gifts from the sea itself. They long protected Kul Tiran flagships against even the fiercest storms, but after the tidesages settled in Stormsong Valley, the wards have instead kept the Shrine safe. To enter the Shrine of the Storm one must use the Rod of Tides, which Tideguard Victoria states "deemed" the player character worthy; this perhaps implies the Tidemother could reject one from entering the Shrine of the Storm.

Speculation

 * The Tidemother may be a water elemental since her followers are described as listening to the sea, or perhaps a kraken given all the kraken imagery in Kul Tiran and tidesage architecture.
 * She may simply be the Spirit of Water as identified by humans who were unfamiliar with shamanism, or perhaps Neptulon taking another form.
 * She may also be an aquatic kraken Wild God, or a kraken goddess such as Oacha'noa, who called humans to her nearby territory.
 * The Dreadwake is held aloft by an unknown kraken-faced god of the deeps that may be her or N'Zoth.
 * The Tidemother may be Elune, given her "whispers" play on the tides, the quest Power Over the Tides has the Orb of Elune being used to banish enraged water elementals, Sharas'dal has power due to being filled with water from the Well of Eternity which was associated with Elune in night elf beliefs, the Lost Sailors' Memorial has a prayer to the White Lady for protection, and one of the murals at the Shrine of the Storm depicts what could be moonlight being used by the Tidesages to bless the ships, as well as the floor design in the Fonts of Cleansing resembling a full moon. The Lost Sailors' Memorial also has a broken statue that is the same model of one of the night elf Elune statues used in the Tomb of Sargeras instance. Additionally, the Rod of Tides is found on a platform in Sagehold that is the same model as the moonwells seen in Vault of the Wardens. Xal'atath also mentions that the Shrine of the Storm has had many names over the ages and is a place of ancient power, similar to her comments for the Tomb of Sargeras. It could be that the Lost Sailor's Memorial is a remnant of a night elf temple, and likewise, the Shrine could've been another Temple before the Great Sundering. The ankoan Farseer Ori also is whispered to by the tides, and the ankoan are an offshoot of the jinyu, who are murlocs empowered by the waters of the Well of Eternity in the Vale of Eternal Blossoms.
 * She may be Queen Azshara, or rather Azshara may have been impersonating the Tidemother since the tidesages claim that the Tidemother's voice changed recently, causing the corruption of Lord Stormsong and others. Her new whispers are not to be listened to. Interestingly, Azshara's elementals are named exactly as the three wards protecting the Shrine of the Storm.
 * There might be some connection to the Drust druids the Thornspeakers given only Tidesages can safely access Fate's End island, that is inherently connected to Thros.