Clayman (クレイマン kureiman) was a Demon Lord Seed who was a member of the Ten Great Demon Lords. He is considered a ghastly man, infamous for his acts of manipulating his subordinates and others like dolls.
Clayman has an overall appearance of a wealthy noble. He has a slim, oblong head with a sharp chin and defined jawlines, having a pair of pointed ears on either side and his eyebrows are thin.
His getup involves a three-layered tuxedo, having an overall white color scheme.
When he puts his mask on and acts as the "Crazed Clown," he seems more like a mad beast instead.
Clayman is a cunning and manipulative Demon Lord. He prefers to manipulate things in the background rather than get into conflict himself. He specializes in intelligence gathering with the use of his ability in order to perfect his scheme to obtain more power.
Clayman treats his subordinates and those he considers below him very poorly. He would throw away those who are no longer useful to him and force others to submit using his unique skill.
300 years ago, He became one of the Ten Great Demon Lords with Kazaream's help. The moment he became a Demon Lord, he began hunting down Majin and monsters to steal their hearts (literally). Making them swear loyalty to him, he inscribed a curse onto their hearts, making them his eternal servants.
After Kazaream was defeated by Leon, Clayman hadn't received any words from him for a long time, until he met a mysterious patron who offered the resurrection of Kazaream in exchange of Moderate Harlequin Alliance's help in taking over the world.
Forest Disturbance Arc
Clayman was the true mastermind behind the Orc Disaster incident, hoping to gain a puppet Demon Lord to help give him an edge against other Demon Lord. He helped Gelmud and introduced him to the Moderate Harlequin Alliance.
Demon Lord Attack
After his plan failed, the Demon Lords agreed to abolish the nonaggression pact over The Great Jura Forest and to each sent out their own forces to gather info upon the new powers rising in the forest. He chose to send out Mjurran to spy on the victors of the Orc Disaster incident.
He then received news from Tear that Frey is worried about the return of Charybdis. He chose to manipulate the beastman Phobio to be the new host of Charybdis so that it may attack Milim who was residing inside the Jura Tempest Federation. His plan succeeded as Milim managed to defeat Charybdis, earning him a favor from Demon Lord Frey.
Demon Lord Awakening
Clayman started plotting a war between humans and monsters wanting it to result in Tempest's demise, and to collect the souls to awaken him into a True Demon Lord. He ordered Mjurran to cast a great magic spell to create an anti-magic barrier so as to isolate Rimuru City from outside contact. However, his plan failed when Rimuru Tempest managed to destroy the army of the Kingdom of Falmuth and became a True Demon Lord.
Clayman was also plotting the end of the beastmen, ordering Milim to destroy Carrion and his country. In order to control her, Clayman used the orb of domination, that he received from Kazaream, on Milim. Afterward, Clayman threatened Frey, who claimed that she paid off her debt, to keep following his orders lest she becomes Milim's next target.
The Octagram Soars Brightly
Laplace came to warn Clayman about the recklessness of his actions, but Clayman chose to ignore his friend's warning and attacked Yuurazania, after Milim's independent action of giving Yuurazania an advance notice of her attack causing him to be unable to kill even a single citizen as many of them had sought refuge in Jura Tempest Federation.
Falling for the scheme that the participants of the Man-And-Monster Conference came up with, Clayman believed that Rimuru is actually weak and only used Veldora's resurrection to proclaim himself a Demon Lord, consequently Clayman called for a Walpurgis Banquet in order to put Rimuru down. However, to his surprise, Demon Lord Ramiris asked for Rimuru to be able to attend the banquet himself and other demon lords agreed to this decision.
Clayman sent his army along with Milim's followers, the Dragon Worshippers, to attack the Jura Tempest Federation, while he went to the Walpurgis Banquet. However, his plan was revealed and he was betrayed by Milim and Frey who explained that his orb of domination had failed to work on Milim. After being manipulated by Rimuru into psuedo-awakening himself, Clayman managed to get stronger, but that was within Raphael's calculations, so he ended up defeated and killed by Rimuru Tempest.
Kazaream: Clayman's master and creator. Kazaream was the one who induced him into the Demon Lord organisation 300 years ago. Even after becoming a Demon Lord, Clayman still moved following his instructions. Kazaream saw much of himself in Clayman, as he was created to be a schemer much like Kazaream himself.
Adalman: The Index Finger, head of defense forces in Clayman's castle. Clayman's Curse Magic had greatly boosted his power as a monster, transforming him from a wight into a wight king. Adalman is cursed to follow Clayman's order and destroy any intruders.
Yamza: The Middle Finger, the top lieutenant within Clayman's vanguard. He willingly swore loyalty to Clayman.
Piorra: The Pinky Finger, the spy and intelligence collector for Clayman.
Clayman is weaker than the other Moderate Harlequin Alliance members, but he had been created with better brainpower which made him more suited as a commander and strategist.
- This ability can convert information into encrypted communications as it conducted surveillance over a wide area. Deploying a member of his team to an area allowed them to function as his eyes and ears to gather intelligence.
- Marionette Dance: This ability allows him to make dolls out of majins whose souls he stole. Marionette Dolls can immediately regenerate and continue to attack if destroyed. However, these dolls aren't protected against attacks to their souls.
- Intrinsic Skill of Walking Dead: He can connect his astral body to the ley lines to keep his consciousness and memories protected so even if he loses his physical body, he'll never truly die as long as his soul is still intact.
- Dragon Pulse Death Canon: The Youki gathered around the ground with the addition of his own magicule allows the pulse of the earth to be transformed into beams of disturbance effect to attack the enemy. Beams projected from Dragon Pulse Death Canon rises from the ground like a flying dragon. Anyone caught in it would have their arrangement of magicules thrown into chaos, destroying them from the inside. Physical resistance would be useless, and even a magical Barrier would be instantly smashed.
- Giant Magic Missile: Using the energy from his awakening, Clayman can fire a massive ball of magical energy.
- LN Vol 5, Chapter 3.
- LN Vol 3, Chapter 4.
- LN Vol 6, Chapter 5.
- LN Vol 3, Prologue.
- LN Vol 2, Chapter 7.
- LN Vol 3, Epilogue.
- LN Vol 5, Chapter 2.
- LN Vol 5, Epilogue.
- LN Vol 6, Interlude.
- LN Vol 6, Chapter 2.