Manannán mac Lir is a figure from Irish mythology, often regarded as a sea god and a protector of the Otherworld. He is associated with the Tuatha Dé Danann, a mythical race of deities and heroes in Irish folklore. Manannán is known for his magical abilities, including the power to control the weather and create illusions. He is often depicted as a wise and benevolent figure, guiding souls to the afterlife. Manannán mac Lir is also linked to various mythical artifacts, such as the Cloak of Invisibility and the Horse of the Sea, which further emphasize his connection to the ocean and the supernatural.