- Web Novel
Guy has bloodred eyes with "stars of gold and silver dancing in them". His wavy, burning hair is a deep shade of rouge. He's about as tall as Leon and his beauty is prideful and distant. He looks like someone born to lead and conquer. He has his clothes draped over himself, revealing a lot of skin.
He is normally very prideful and relaxed. He doesnt care much about others but if someone interests him he will try to get closer to them.
He appears to be very forward in his relationships. He made several suggestive and openly sexual advances to Leon Cromwell while in his male form, despite Leon's insistence that he preferred women. Guy responded by on multiple occasions with offers to transform into a woman, only to be rebuffed.
Guy can change his gender with ease and is interested in both genders.
He's also interested in individuals with Ultimate Skills like Leon.
Guy was summoned to the world by a human as an Arch Demon and was tasked with destroying a nation the human was at war with. He followed that up by destroying the human's nation as well. This earned him his name. An unpleasant-sounding name, like the shrieks of the doomed and desperate as he crushed them. After being named he realized that he has awoken as a True Demon Lord. He thought it was needless at first since he believed he was already the strongest but this evolution also affected the two other Primordials, Vert and Bleu who were summoned alongside him as errand girls. They were given physical bodies as well as an evolution to Demon Peer. Guy gave them the names Misery and Rhein reflecting the misery of mankind and the rain of blood that fell wherever Guy strode.
Soon after Guy awakened as a Demon Lord, another did the same. This was Milim. She was given a pet dragon that would serve as her father, Veldanava's incarnation someday. This pet was killed by a foolish kingdom and in her blind rage Milim destroyed the country which made her awaken. Guy stopped her. The battle took place over seven days and seven nights, the battle turned the bountiful fields of the west into an utter wasteland. In the end there was no winner. The battle ended after Milim regained her senses with the help of Ramiris.
After the battle, the three of them came to an agreement. They became the first demon lords and each had a separate goal.
Guy invited Leon Cromwell to his residence and upon Leon's arrival Guy greeted him and kissed him. They moved to a terrace on the highest floor of the castle to have a discussion. Guy implored Leon to attend the upcoming Walpurgis Banquet and mentioned that it was Clayman who called the Walpurgis and Milim cosigned it. Both Guy and Leon think that the reports on Carrion's death are false and Guy is unsure whether this is one of Milim's games or not. Leon asked Guy whether he thinks Clayman is controlling Milim but he says that he is too intelligent to read the behavior of a moron like Milim. Guy asks Leon whether he will be participating in the Walpurgis Banquet, after Leon's reply Guy asks Leon whether he'd like to sleep with him but Leon declines. Then they started discussing Ramiris's suggestion to include Rimuru in the banquet and Veldora's resurrection. Guy was shocked to hear that Veldora broke free, at this point Velzard joined the conversation and Leon explained what he heard about Veldora's resurrection. After Leon finished his explanation Guy became very happy and interested in Rimuru. The three of them speculated that Clayman's actions, Milim's behavior and Veldora breaking free might be connected. Guy changed the topic and asked Leon about his collaborator from the Eastern Empire and asked him to be careful. After Leon left Guy brooded over the upcoming Walpurgis and got excited.
During the Walpurgis, before the actual meeting started he was calmly sitting in his chair waiting for everyone to arrive. Rimuru tried analyzing him but Guy was hiding everything and made it seem like he was a weak, inexperienced kid. Magically strong but unable to control his aura.
After the meeting started and Rimuru and Clayman started arguing but Guy told Clayman to defeat Rimuru with his own powers if he thinks of himself as a demon lord and asked Rimuru if he declares himself a demon lord. Guy told him that if Rimuru wins against Clayman he will allow him to adopt the demon lord title. When Clayman asked Guy if its okay for Milim to fight for him, he allowed it.
When the fighting started, Guy isolated Clayman and Rimuru from the others with a barrier. Ramiris asked Guy to allow Beretta to join in but he declined it instantly. Guy doubted Beretta's loyalty to Ramiris and thought he was suspicious. In the end, Guy allowed Beretta to participate but made him refuse recognizing another master apart from Ramiris from now on. If Beretta were to weasel out of the question Guy would have destroyed him but to his surprise he accepted. Guy was confused by Beretta's behaviour and it reminded him of a demon he knew. He thought that it wouldnt be so strange if they are of the same lineage but this demon in Guy's mind rarely birthed other family members. Only few were aware of him at all. Guy asked Beretta about his lineage and figured out that he was right. After he finished his questioning he let Beretta go. Beretta told him that with "that lord" serving Rimuru he wouldn't have another chance to show his skills. Guy had a guess who this "lord" is. It was Noir, and old friend of Guy. He was incredibly happy while watching the battle infront of him even though he could already see the conclusion. He decided to remember Rimuru's name.
When Rimuru was about to kill Clayman, he put up a barrier he copied from Guy. Guy was bemused but unangered by it. Rimuru asked if anyone wants Clayman alive but Guy spoke for the whole council and said he can do what he wants. After Clayman's death, Guy congratulated Rimuru and declared him a demon lord.
After Frey and Carrion resigned they had to get a new name for themselves since they have been reduced to 8 members. Guy asked everyone to calm down and work on a new name together. He dumped the job of coming up with a new name on Rimuru. Rimuru objected at first but Guy's intimidation made him accept.
Since Dagrule kicked Dino out of his residence. Guy pressured Dino into living in Tempest because he himself didn't want to deal with Dino.
Later, Guy sent Rhein to Ruberios but Diablo met her and defeated her. After this Guy appeared and started chatting with Diablo. He said that the Disintegration Diablo used to defeat Rhein would even kill him, only if it hits. Guy asked Diablo why he waited so long to evolve but Diablo responded with a question of his own, he asked Guy whether he thought there were anyone stronger than them in the world. Guy said that other than True Dragons there is no one stronger than them. Diablo started praising Rimuru which made Guy annoyed and asked him to stop. Then Guy mentioned that even though Rimuru conquered the Western Nations Guy's subordinates are wreaking havoc there. In his view it was just a prank on the humans. Diablo's response made Guy annoyed. At this point, Guy got a message from Misery and asked Diablo when White got named. Diablo explained to him proudly that it was Rimuru who named her. Guy found the situation laughable since the balance of power he maintained for thousands of years was shattered to pieces. He decided to ask about the other two of the primordial trio. Guy was utterly astounded upon hearing that both Violet and Jaune were named by Rimuru. After further explanation from Diablo Guy got even angrier and decided to pay a visit to Rimuru later.
Eve of War
Following his brief reunion with Diablo, Guy proceeds to Ruberios along with Rhein and appears in front of Yuuki and entourage who were in the midst of escaping. Misery shows up shortly after and pins down the attacking Footman. Being the man that he is, Guy has his eyes set solely on Yuuki and doesn't spare a single glance to his companions, showing they're not worth his attention. Yuuki discerns their identity from the information he received from Clayman and Kagali but doesn't despair at this impediment; in fact, he cheerfully throws an offer of teaming up at Guy knowing full well it would fail, to gauge his intention. Guy laughs and calls him interesting but rejects, bringing up that he's an enemy of Leon. He came with the goal of stopping Yuuki from immigrating to the Eastern Empire, as he doesn't want Rudra's forces to grow any stronger. Seeing that negotiations are closed off, Yuuki adopts a fighting stance. Guy smirks, asking if he thinks he'll win, Yuuki replies saying he'll have to defeat him eventually so all he was doing was speeding up the schedule. Guy orders Misery to let go of Footman and promises to Yuuki that he'll let them go if he manages to defeat him, displaying arrogance befitting of his title of overlord. Yuuki launches a kick at Guy but is repelled by the small barrier he set up. All of Yuuki's following attacks failed as Guy had a counter to each of them, including Yuuki's Anti-skill, and was beaten to a pulp. Laplace attempts to sacrifice himself by pretending to turn traitor but is thwarted by Yuuki who manages to find the strength to get back up. He questions why Guy hasn't killed them, as he's only inflicted attacks that left him on the brink of death, he wonders if he has some reason. Guy admits to it but refuses to tell him so Yuuki quickly switches track and strikes up a deal with him, he tries to sway Guy's mind about them escaping east by proposing that while they're in the Empire, they'll act as his pawns and destroy it from within. Guy considers this proposal very intriguing and decides to let them go, warning them that they won't be so lucky the next time they meet.
A day later, Guy visits Tempest and intrudes on Rimuru's meeting with Leon and Luminous to discuss with him why he took in more Primordials and disrupted the balance of the world. Diablo tried to kick him out and have him visit another date, but in the end was allowed to attend the meeting.
He views Leon as a valuable friend. He also makes sexual advances on him whenever a chance arises.
Velzard is Guy's partner and friend. Guy views her as an equal.
Both of them are Guy's subordinates. Since Guy named them they've been completely loyal to him. He uses them as his maids.
Milim is Guy's good friend and fellow demon lord. They founded the Walpurgis Council together.
Guy and Milim are acquaintance since Ancient Times. As both He and Ramiris stopped the rampage of The Destroyer - Milim Nava.
Ramiris is Guy's good friend and fellow demon lord. They founded the Walpurgis Council together.
Guy values Ramiris very deeply as he threaten Leon Cromwell to become his enemy if he where to cause harm to Ramiris.
They are old friends who often fought and competed with each other. They were once similar in power but Diablo stopped pursuing strength.
As the both of them are fellow Primordials, they've known each other for a long time.
Guy thinks Rimuru is very interesting and worth keeping track of. Rimuru unknowingly angers Guy by upsetting the world's balance of power.
Guy is intrigued by Yuuki, he considers his ambition to defeat him and rule the world amusing. He's loosely operating under Guy.