The secondary blue Ultraman of Ultraman Gaia. His human host is Fujimiya Hiroya. Agul is the manifestation of the sea, much like how Gaia is the manifestation of the Earth. Agul bonded with Fujimiya Hiroya to protect the Earth, but not humanity, leading to several disagreements and battles against Gaia. Eventually, Fujimiya regained his faith in humanity and fought alongside Gaia against the minions of the Radical Destruction Bringer.
