El of the Water

El of the Water is a whale-themed Lord and the strongest of the sea-based Lords, he useds a forked spear named the Resentment Du Sanga as his weapon, along with telekinesis and regeneration

Kamen Rider Agito
The Lord responsible for the Akatsuki Incident, "killing" Sawaki when he awakened as the 2nd Agito. The El of Water allowed the others aboard to live until they undergo the evolution to Agito, entering the body of Masumi Seika to ensure they never tell anyone of what had occurred. He eventually awakened, using Masumi to kill for him until he found the Overlord who gave him the power needed to leave his host, killing her in the process.

Using Orcinus to stall Agito, the El arrived to personally finish the job and kill Shōichi, who was intimidated by the El. However Ryō intervened and got Shōichi out of harm's way. The El of Water later encountered G3-X, yet spared him after sensing Hikawa's zero potential of becoming an Agito himself. The El later fought Gills and G3-X, only the El makes the two fall unconscious. After Agito in Burning Form defeated Orcinus, the El Lord was eventually also defeated by Agito Burning Form's Burning Bomber. However, he returns to the Overlord's body to recuperate and undergo an evolution of his own.

By the time he completed the changes, the Overlord sent the El of the Water after the Agitos. In his new Strengthen Form, the El of the Water possess a the Hateful Bardiche (怨念のバルディッシュ, On'nen no Barudisshu) and heighten psychic power. He managed to overpower the Riders, taking out Agito while fighting the others and winning. But once Shōichi awaken with his memories restored, he battles the El in Burning Form after G3-X was injured. However, even Burning Rider Punch couldn't injure the El. Fortunately, both Exceed Gills and Another Agito joins the fray. Soon enough, the tables turned and the El was wounded by Exceed Gills's Exceed Heel Claw and Another Agito's Assault Kick before Agito assumes Shining Form lands the deathblow with the Shining Rider Kick.

The El of Water was unable to return to the Overlord's body in time and was reduced to a puddle of water, much to his creator's shock.

OOO, Den-O, All Riders: Let's Go Kamen Riders
El of the Water: A whale Lord with the power of water and ability of human speech. He participates in Shocker's meeting with the various villains, but isn't seen during their later offensive.