He appears to be a relatively tall individual, with light grey hair partitioned to a side and yellow eyes. He is dressed in similar black and golden attire worn by clan leaders with a cape to go over it. He donned the same outfit back at Muzaka's reign too when all the other pack members wore white shrouds.
Maduke is a very keen sighted person and he doesn't trust others including his loyal subordinates ex: Kentas who was put under surveillance when he expressed his displeasure against the use of Garda as an experiment specimen. Maduke doesn't mind sacrificing the members of his race if it leads to the growth of his strength.
Maduke is a cold and patient person who believes himself to be the one true Lord of the Werewolves. He waited for centuries to remove Muzaka from his position as the Lord.
Maduke believes that the only way for long lasting peace to exist is that the world should be ruled by the strong and the war is just a way to achieve that. (Noblesse OVA)
During Muzaka's reign as the werewolf Lord and due to his random wanderings, Maduke carried out most of the communications with Nobles and humans as their pack representative. His role was of the beta wolf in the pack and also the chief conspirator against Muzaka.
Maduke is first seen sitting on a throne in a large room when he is approached by the Lunark, who is answering his summons. He informs her about the activities of the 4th and 9th Elders and directly orders her to investigate all their activities.
He discovered that Muzaka, the former lord of werewolves, is alive, when the Union elders watched the footage of what occurred in Roctis' Island. Barely managing to maintain composure from the shocking revelation, he and other elders abruptly ended their conference. Soon after, he furiously admonishes Roctis and his clan for hiding Muzaka.
Later, the 5th Elder reports to him that both the 4th and 9th Elders have been killed, the 4th by the Noblesse. She also reports to him that Muzaka was there and that it seemed like he has always been there. After she has returned with Kentas, he tells them that he suspects there may be more Elders, if not all of them except for him, who are involved in the hiding of Muzaka. Kentas asks for his permission to attack the Union. However, the 2nd Elder, playing a sadistic grin on his face, comments they can always destroy an organization such as the Union and tells them to search for Muzaka instead, whilst also keeping a close eye on South Korea, where the Noblesse reappeared.
On his next appearance, he rebukes Crombel for being late to a meeting, which was ironically proposed by Crombel himself. During the meeting, the 2nd Elder remains silent, just listening to the conversation between Crombel and the 1st Elder, about how the Union is going to fill the void left by the 9th Elder's sudden death. When Crombel proposes that he would like a promotion to the role of Union's leading scientist, the 2nd Elder is disgusted by the endless greed of humans. However, he agrees with the 1st Elder, in saying that the role of the 9th Elder is very important and that they will decide once the other Elders are present.
In the flashback arc, Maduke is shown with other werewolves after Muzaka arrives in their base from one of his wanderings. As the others struggle to answer to their Lord why the nobles chose to interfere in werewolf activities, Maduke steps up to explain. He convinces Muzaka that it was always the nobles who continuously interfered in their business and all they did was answer to human call for aid. He further opines that they should make it clear to the nobles to stay clear from interfering in werewolf activities and engage in a war of strength, if necessary. He volunteers to convey the view of the pack to the noble Lord but is surprised, along with the rest, when Muzaka decides to run the errand himself.
As Muzaka leaves to visit Lukedonia, Maduke and the others (with the exception of Garda) discuss how to confront the situation should the nobles inform of their real activities to Muzaka. Maduke decides to eliminate all evidences against them before Muzaka returns.
When Muzaka returns after learning the truth from nobles, the two Werewolves confront each other with great distaste and Maduke invites his Lord to speak. Muzaka asks his servant about what has happened and his deadly expression shows Maduke that Muzaka has found out everything. However, Maduke plainly pretends as if nothing has happened but Muzaka only gets more serious as he recounts what he heard from Maduke differs greatly to the truth. The other Werewolves show their concern but Maduke remains calm and tries to lighten the mood by making a joke about how quickly Muzaka managed to visit the Noble Lord and speak to him and come back so soon. However, Muzaka is in no mood to joke around and demands Maduke to respond to the question. Maduke says that although he does not know what the Nobles told Muzaka, they only told their Lord the truth and nothing differed from their report. Muzaka asks for his confirmation and Maduke promises that they did not hide anything from him nor lie to him. But Muzaka doesn't calm down and demands Maduke to explain the reasons for intervening in human wars and killing many people and for repeatedly doing this from the past, ruling over the humans in the process. Maduke remains silent and Muzaka asks them if the Nobles lied to him and Maduke says that is the truth for now. Muzaka then demands an explanation for this nonsense as both groups claim to be telling the truth yet their claims differ greatly. Maduke reassures his Lord that they never lied and reminds him that they always helped those humans who asked for help. Muzaka becomes enraged as Maduke confirms that they only helped the humans 'a little' and his standard of 'a little' help included killing and ruling over the humans. But Maduke confidently speaks back, saying that they don't understand what is considered helping the humans a little if ruling over them doesn't classify as one because killing or ruling over the humans is easy for their kind therefore it shouldn't be a problem if the Werewolves acted freely towards the humans. Muzaka is lost in rage and screams Maduke's name, radiating vast amounts of aura. All the Werewolves in his presence shiver in fear and Garda pleads for him to calm down. But Muzaka tells Garda to shut up as she has no right to ask him to calm down after hearing all this herself. Maduke then asks his Lord why he is getting so angry and says that they cannot understand why he is acting in this way. Muzaka then asks them whether they really don't know and if they thought they were going to get away with what they have done. But Maduke defends himself, saying they haven't committed any big crime as there is no rule in their pack history saying that they were not allowed to interfere in human affairs. Maduke carries on, saying that it was always their choice not to involve themselves in the human world and now, they decided to change to keep up with the changing world. Muzaka ignores all this and grabs Maduke by the throat and tells him to stop playing with words. Maduke gives out a loud laugh and tells him that this is no game, but the opinion of the whole pack and that they all hope that their Lord is selfless enough to sacrifice his sole opinion for the greater good (the pack's opinion). Muzaka asks him to clarify his words and Maduke asks him to punish him if he thinks the whole pack's opinion is just a playing of words and says they must obey their Lord if that is the case. Muzaka remembers what Garda had told him earlier and finally lets go of Maduke. Maduke tells his Lord that they know he is doing this to protect the weak humans but he must know that all this happened because those humans, whom Muzaka desperately wanted to protect, wanted it. Muzaka is confused by what he just heard but Maduke goes on to reveal that the humans asked for their help, asked for their powers, to kill their enemies and they were the ones who asked them to rule over them and they were the ones to take advantage of this to rule over weaker humans. Maduke reminds Muzaka that he also knew that the humans always approached them and asked for all kinds of help and at last, they resigned and decided to help. Garda remains silent, looking more and more concerned, and Muzaka turns away from his servants and walks away whilst the other Werewolves grin in triumph.
A few months later, Muzaka returns at the Werewolves' Lair after meeting with Rai and learning from Rai about his next course of action. Muzaka has his pack members gathered before his throne and tells them that his thoughts on these matters haven't changed: Werewolves will only be allowed to interfere in human affairs moderately. This confuses them all but Muzaka reminds them that they know what is being asked of them and warns them that any more incidents like the recent one will not be tolerated. Maduke stands up for the pack as he says that although he understands what his Lord is requesting, he cannot see why his Lord would be so selfish to proceed with his own policy in preference of the pack's. Muzaka tells him that he knows they want freedom and that although he isn't willing to stop them from being free, he cannot allow them to use their powers against humans. Muzaka remains firm as he says that he is willing to suppress the whole pack's opinion. Maduke questions his Lord's logic as he asks why they cannot use their powers according to their own will and that they should have the freedom to use their powers in the human world. Muzaka tells him that it's not right for them to use their powers against humans as they please but Maduke reminds him that it's always the humans who ask for their help, which suggests that they too, are willing to be affected by their powers. Muzaka clarifies their boundaries as he tells them that they are still allowed to blend in with humans to give them help and influence them a bit and all this, he won't stop. But he reminds them of the vast difference in power between them and humans and therefore, it is not right for them to interfere in human affairs and act as they please, abusing their powers like in the last incident, which will ultimately break the balance of the world. He then proudly announces that he will not let wrongdoings happen in front of his eyes. As Maduke grits his teeth, Muzaka also announces that this is the law all of them will have to honor as long as he is their Lord and if any of them have a problem with that, they can come and challenge him - he will not decline a challenge, according to the laws of the pack. Muzaka reveals that he would have no problem if any of them beat him and did as he pleased. Maduke says that he cannot believe this situation and questions the importance of humans that their Lord is willing to suppress them so much. Maduke goes on to even liken Muzaka to a Noble and asks him whether his recent stay with the Noblesse has influenced him. Muzaka tells him that this has nothing to do with that but Maduke asks him if that's true, why is he favoring humans and oppressing his own pack. When Muzaka tells him that that is purely because what they want is unjust, Maduke asks his Lord to name the penalty they will face if they committed a crime (what he would think as unjust) and asks him if he will be as mad as the Noblesse. This confuses Muzaka and Maduke reveals that they happened to hear about what even most of the Nobles do not know about, which is that long ago, many Nobles were imprudently forming contracts with humans and like themselves, influenced the human world heavily. When these Nobles then took the lives of many innocent humans, the Nobles of Lukedonia finally found out about this. At the moment, one Noble from Lukedonia acted quickly to execute all of those Nobles and that's when they came to find out about the Noblesse. Maduke shouts at his Lord, confirming that the Noblesse, whom his Lord just met and spent time with, killed the members of his own race because they killed humans, just those pathetic humans. Muzaka is caught in great shock as he remembers what Raizel told him and finally realizes the true meaning behind his warning and the reason why he always stayed away from everyone and be lonely the whole time. Maduke asks his Lord if that is what he would also do to his own people, like the Noblesse but they do not hear a reply as their Lord disappears immediately.
Back in present time, Maduke sends a team of four werewolves to South Korea in order to eliminate Muzaka. When the other Elders ask him to explain himself, Maduke says that Union has nor right to interfere in the internal affairs of his clan. Maduke is enraged when he learns that his subordinates failed to eliminate Muzaka.
Maduke then conspires with the traitor nobles to invade Lukedonia as nobles are the reason why werewolves can't rule the world. He is enraged when he learns the news about the failed invasion and the threat from Lukedonia which said that werewolves would pay for the invasion.
Maduke gets some relief when Ignes Kravei joins him.
Kentas confronts Maduke regarding Garda's captivity in the laboratory. Kentas asks whether Maduke knew about it. Although Maduke says nothing, Kentas intuitively realizes Maduke does. Kentas requests an explanation as to why the supposed traitor is alive when it was told by Maduke that the werewolf lord personally 'took care' of her. Maduke justifies his action by claiming Garda a traitress and there is nothing wrong with a traitress being sacrificed for their race and be experimented on. Kentas becomes disillusioned with Maduke as the latter doesn't hesitate to use a member of his own race as an experiment and comes to believe that their race is becoming like the humans who don't hesitate to sacrifice their own kind to satisfy their greed for power.
Maduke then quickly changes the subject and demands an explanation from Kentas as to why he entered the lab without permission. Kentas immediately apologizes. Maduke makes it clear that under normal circumstances he would have been punished but due to the current crisis occurring in the werewolf clan and Kentas' dedication for the clan he is to be spared just this once. Maduke then sends Kentas away and instructs him to wait for further orders. After Kentas is out of Maduke's sight, he summons another werewolf, Juraki, to keep an eye on Kentas.
After some time he ask Lunark about Kentas' whereabouts but Lunark feign surprise over Kentas disappearance. He dismisses her though he is now suspicious of her.
In Werewolf clan's lab, Ignes reports to Maduke about the death of three werewolves who weren't able to handle the pressure of experiments. She wonders if he is upset but Maduke reassures her as she had his approval.
Maduke assures Ignes that he will provide her with more subjects since Garda was the only werewolf to withstand the intensity of her experiments. Maduke enquires her about Muzaka as she and 9th Elder experimented on him behind Maduke's back. She informs him in her crazy style that Muzaka was an exceptional test subject and would regenerate quickly no matter how much they mauled him. Maduke takes his leave and he knows that both him and Ignes are using each other. He hopes that Ignes will be able to create someone stronger than Muzaka as she has researched on Muzaka's abilities for a long time.
Later on Kentas is seen kneeling before Maduke sitting on his throne, handcuffed. He is surrounded by Lunark and other werewolves present under Maduke's order to witness his fate. Maduke expresses his disappointment of Kentas and accuses him of treason. Kentas makes a futile attempt to explain his actions, only to be logically refuted by Maduke who saw through Kentas. He is left confused, for he has existed pridefully for his clan and maintained his dignity as a werewolf warrior all his life only to be branded traitor. Kentas then suddenly lashes out at Lunark, accusing her of selling him out. Gayare intervenes to restrain Kentas, knocking him unconscious. Maduke orders Gayare to take away Kentas and sets his fate as an experiment specimen. Maduke also clears Lunark from his suspicion after witnessing Kentas behavior.
Few days later, the werewolves inform Maduke of Lunark's disappearance. The other werewolves believe she has turned into a traitor. They ask for Maduke's permission to hunt her down and bring her back. Maduke refuses them as he knows she would be back. He further states she would come with the traitor Muzaka. He orders his subordinates to 'prepare' for the arrival of Muzaka. Maduke is pleased by the situation and he promises himself that he will show Muzaka who is the true Lord of werewolves.
He is yet to be seen in actual combat but judging by his position as 2nd Elder and as Lord of the werewolves, he is undoubtedly an immensely powerful individual.
He effectively manages and controls his werewolf minions well, as Kentas, for all his warlike disposition, still bows down to the command of the 2nd Elder. However, it is evident from Season 7, that he is significantly weaker than Muzaka, as he did not even attempt to protect himself when Muzaka approached him to grab him by the throat and also because Muzaka was elected as their Lord, due to his immense powers.