Master Xandred

Master Xandred is the Vaiśravaṇa/Japanese spiny lobster-themed leader of the Nighloks and is armed with a broadsword. The most powerful of the Nighlok, Xandred is prone to frequent violent outbursts, usually directed at the failure of his subordinates to destroy the Rangers. He seeks to cause the Sanzu River to flood with the despair of humans, allowing him to enter the world of the living and conquer it. His rage was originally endless until he heard the sound of Dayu's Harmonium.

Master Xandred was sealed within the Netherworld years ago in a battle with the last team of Samurai Rangers led by Jayden's father, who perished after using his symbol power to imprison Xandred. Xandred possesses enormous strength and power, easily able to overpower the Samurai Rangers in their first encounter, and is proven to be a capable swordsman. Power energy radiates from his body that can sometimes incapacitate him but has also been shown to create new Moogers and Spitfangs. However he displays a number of fatal weakness as well. Because of the (incomplete) seal that the original Red Ranger placed on him, Xandred's power is not at its peak. Not only that but he constantly suffers from a headache that only Octoroo's sake-like medicine and the music from Dayu's harmonium are able to soothe. Like other Nighlok, Xandred's body dries out if he's not in the Netherworld, although he dries out much faster than any other Nighlok (whether or not this is a result of the seal on him, it is never stated) and it takes longer for the Sanzu River's polluted water to soak back into Xandred's body.

In "The Master Returns," Xandred gets even more angry than before after he is told by Octoroo of Serrator's betrayal. He plans to go to Earth through a gap. Though Octoroo advises him not to, Xandred makes his return to Earth planning to destroy Serrator along with the Samurai Rangers. Instantly Xandred starts to dry up, but he fights the Rangers anyway and completely overpowers them. Jayden goes to take him on with his Bullzooka, but Xandred manages to block all the shots. He is able to defeat Jayden even in Super Samurai Mode, leaving him badly hurt and unable to stand up. Afterwards, Xandred repairs and gives Dayu back her harmonium. Xandred is about to completely dry up when Octoroo brings him into the Netherworld to rejuvenate, sinking to the bottom of the Sanzu River. This ends up giving Serrator the opportunity to take over Xandred's ship and split world in two.

In "Evil Reborn," the result of Mia destroying Dayu's Harmonium is enough to raise the Sanzu River and fully heal Master Xandred as he appears on Earth to confront the Rangers.

In "The Sealing Symbol," Xandred states that with his power renewed, he is unstoppable. When Dayu is starting to succumb to her injuries, Xandred puts her out of his misery and assumes a stronger form. While Lauren writes the Sealing Symbol, the other Samurai Rangers fight Xandred to keep him from attacking Lauren. Xandred moves fast enough to knock the Rangers down as the Samurai Rangers work to keep Xandred from attacking Lauren. When Lauren writes the Sealing Symbol and fires it towards Xandred, it has no effect on Xandred as he emerges with a white patch that represented Dayu's human side that keeps him from drying out and immunizes the Sealing Symbol as well. Xandred attacks the Samurai Rangers as Jayden uses a teleportation symbol to get the Samurai Rangers away from Xandred. Xandred then takes a kimono that Dayu had dropped and retreats back to the Netherworld.

After Octoroo holds a brief memorial for Dayu, Xandred states that she has served her purpose and that it is time to invade Earth. He begins the invasion on Earth by unleashing the waters of the Sanzu River upon the Earth. Xandred tells Octoroo that they have yet to defeat the Samurai Rangers. Xandred confronts the Rangers during their fight with an army of Moogers. Jayden plans to attack the white spot on Xandred that Dayu's humanity is on while the other Samurai Rangers fight the Moogers and the Spitfangs. Jayden uses his Super Spin Sword on the white patch but Xandred states that he can't be defeated that easily. Xandred then uses his Netherwind attack and the Flames of the Netherworld to take down the Rangers. Xandred is surprised the Rangers will not beg for mercy, even in defeat so he plans to go after Lauren expecting them to beg for her.

In the final episode "Samurai Forever," the Rangers chase him down and attack him with everything they have. Jayden then uses the Second Shiba Fire Disk as their trump card. Jayden finally destroys Xandred as the Red Shogun Ranger, but Xandred returned in the form of a Mega Monster.

Xandred manages to repel the Beetlezord, Swordfishzord, Tigerzord, Octozord, Clawzord, Bullzord and the Samurai Shield until only the Samurai Megazord was left standing. The Rangers put all the symbol power they have left into one final strike which slashes Xandred in half. In his final moments before his destruction, Xandred brags to the Rangers that they may have beaten him, but the Nighloks will rise again one day.