Lanayru (Twilight Princess)

Lanayru is the fourth and final Light Spirit Link encounters in The Legend of Zelda: Twilight Princess. He resides in Lanayru Spring, where his power was stolen by Twilit Messengers. After Link meets his broken spirit, which appears to be a small cloud, he will provide the Vessel of Light to carry the Tears of Light.

After Link kills all the Parasites, Lanayru gives him a disturbing explanation of what the Fused Shadow is. After Link gathers all the Fused Shadows, Zant appears behind Link. Lanayru tries to scare away Zant, but his releases a blast of energy that knocks Lanayru down. Zant then steals his power, making the area twilit again. He then inserts a device in Link's head that makes him a permanent wolf. Zant takes the Fused Shadow from Midna and forces Lanayru to expose her to his light power. Instead of killing Midna like he had hoped, Lanayru uses his power to teleport Midna and Link to Hyrule Castle. Even though Minda is alive, she is clinging to life because of her exposure to light. Lanayru tells Link to seek Princess Zelda to heal Midna.

At the battle with Ganondorf, Lanayru gives Zelda some of his power, providing her with the Light Arrows. After the battle, he helps Midna return to her true form.

Lanayru appears to be a giant toothed serpent. He stores his power in his mouth.