|“||In the face of overwhelming power... sentiment and vengefulness are meaningless. Everything is.
Zenon is a tall man with black, messy hair. His most notable feature is a black, cross-shaped mark on the left side of his forehead and it extends down across his left eye.
Zenon wears a black shirt with a high collar and black pants that tuck into brown boots. Additionally, he wears a dark blue fur coat with a short, light gray fur mantle on top. The back of the mantle is emblazoned with a spade symbol. When using his devil's power, the mantle becomes dark-colored.
When using 55% of his devil's power, Zenon sprouts a pair of slightly curved horns from the top of his head and bat-like wings from his back, and the marking on his face expands. A dark-colored magic covers over half of his body, including the left horn and wing.
After Zenon unleashes 100% of his devil's power, his full body is covered in black, including both horns and wings. Armor created from Bone Magic covers his chest in the form of a ribcage, bony appendages sprout from his back, his shoulders, forearm, hands as well as legs gets covered with bone armor, a helmet-like accessory fashioned from bone covers his left horn as well as half his face, the cross mark expands to the right part of his face and a second set of smaller horns appears on his forehead and he grows a whip-like tail with a trident-shaped tip.
Zenon is extremely merciless. He does not seem to talk much, preferring to settle disputes with his magic power.
A facet of Zenon's personality seems to be his devotion and loyalty for his home kingdom of Spade. He is highly meticulous and determined to acquire more power to add to the Spade Kingdom's war force. He goes as far as invading the Clover Kingdom and directly attacking the Golden Dawn's base for the sole purpose of obtaining an Arcane Stage mage for his kingdom's military.
However, beneath Zenon's typically cold and serious disposition lies a bloodthirsty individual. He coldly insults the defeated and brutalized members of the Golden Dawn and belittles his own subordinates as useless upon their defeats. He later looks down on and grins as he viciously attacks Yuno and that all of his actions are for the sake of the Spade Kingdom's glory.
Unlike Dante and Vanica who love fighting against strong opponents to the point of either prolonging their battle or letting them live to become stronger, Zenon will instead quickly eliminate threats to their plans as he "killed" Yuno who managed to damage him and tried to kill Asta who has Anti Magic.
Six months later, Zenon attends a meeting with the rest of the Dark Triad.
Zenon and two Dark Disciples, Gaderois Godroc and Foyal Migusteau, travel to the Clover Kingdom and attack the Golden Dawn base in order to abduct Captain William Vangeance, an Arcane Stage mage needed to create the Tree of Qliphoth. Zenon confronts William, but Alecdora Sandler steps in to defend the captain. Zenon easily defeats the Magic Knight and expresses his wish to collect William's World Tree Magic for the Spade Kingdom. Zenon captures the captain in a tangle of bones, and the destruction from their fight causes the floor to collapse. After landing on the ground floor, Zenon notes that not all of the Golden Dawns are dead and that Gaderois and Foyal are defeated, meaning 40% is too weak. He attacks the three and easily breaks through Letoile and Klaus's defense.
When Yuno charges at him, Zenon blocks the spirit sword with bones that regenerate faster than they can be eroded. Impressed by Yuno's strength, Zenon demonstrates 55% of his devil's power. He then uses his own bone sword to cut through Yuno's sword and impales the vice-captain. William then breaks free of the bones and fights Zenon long enough to pull his squad members to safety, which Zenon disparages as a distraction for William. Zenon recaptures William and leaves the base.
On his way back to the Spade Kingdom, Zenon senses the magical fluctuations from where Dante is fighting the Black Bulls, and out of concern for his sibling, he creates a portal to the battlefield. There, he ambushes and captures Yami Sukehiro and retrieves the unconscious Dante. When Zenon notices Asta's devil arm, he attempts to capture the young man, but Finral Roulacase redirects the bone. Nearing his limit, Zenon decides to leave Asta behind. The Black Bulls attempt to stop him from taking their captain, but Zenon blocks all of their attacks and leaves through a spatial portal.
Three days later, Zenon checks up on Morris's progress in healing Dante's injuries. Morris promises that Dante will be even stronger after the treatment. Zenon then asks for updates on the frozen demon and the Qliphoth Advent Ritual, both of which are going as planned. The Spade Kingdom's Resistance force appear atop a clocktower in the capital's castle town and publicly call out the Zogratis siblings. Zenon, who anticipated the Resistance attempting to interrupt the ritual, has the giant demon unleashed on the town to exterminate people in it. He dismisses the people as too weak to be citizens of the Spade Kingdom. However, Mereoleona Vermillion appears and defends the people from the demon. Zenon takes his position in the large magic circle for the Qliphoth Advent Ritual. A squad of Magic Knights infiltrates the castle, and Yuno and Langris Vaude confront Zenon.
Zenon asks how Yuno survived their last encounter. Yuno tells him it was due to William and proclaims they will save him. Zenon's bones block Yuno's Tornado Fang, and his Spatial Mana Domination negates Langris Vaude's Archangel Shootdown. Zenon compliments Langris's magic and recognizes that it was intended to counteract his Spatial Magic. However, Zenon dominates the mana in the entire room, negating Langris's Archangel Destruction. Zenon disparages them and William and then proclaims that he will defeat them without having to move. He creates bones all around them, but before they can strike, Yuno merges with Sylph and manages to take control of the nearby mana and disintegrates the bones, which surprises Zenon. Although Zenon's bones stop Yuno's halberd from striking, Yuno throws Zenon's boast back at him before unleashing a spiral of wind that destroys the bones and drills into Zenon's chest. Zenon is forced backward and profusely bleeds.Afterwards, Zenon unleashes 70% percent of his devil's power and yet is still being overpowered by Yuno. However , as the first gate of the underworld opens, Zenon unleashes 100% of his devil's power and, after healing the damage he sustained, begins to attack Yuno with several bone whips that have even more immense regeneration speed and attack power than the ones created from Eternal Fangs. Zenon even boasts that, despite nearly being killed multiple times, the possibility of the duo winning was nothing but a fleeting dream. Zenon also retorts with the same statement Yuno made earlier, remarking that him and Langris Vaude will be the ones to die, as well as brushing their deaths off as he expects the Clover Kingdom to be annihilated, leaving the two with nowhere to return to. Afterwards, Zenon explains to Yuno and Langris that the Dark Triad awoken and released the two ancient demons that the Grinberryalls were trying to seal away, intending to use one of them to destroy the Clover Kingdom as their most powerful mages are in the Spade Kingdom. However, Yuno tells Zenon that Clover Kingdom will be fine since Asta is there.
- Bone Magic: Zenon uses this magic attribute to generate and manipulate his own bones. He typically releases massive tangles of bones that offer no openings to evade and are sharp like spears, brutally skewering opponents. He can increase these bones' regeneration for defensive purposes, repairing them faster than they can be destroyed. He can also shape the bones into weapons to wield by hand, like a sword. After unleashing 100% of his devil's power, he switches to powerful and swift bone whips that has been noted to possess greater attack power as well as regeneration speed. 
- Spatial Magic: Zenon uses this rare magic attribute to manipulate space. His version of this magic attribute involves creating spatial cubes that allows him to dominate and negate the mana trapped within them.
- Immense Magic Power: As a devil host, Zenon possesses an immense amount of magic power. With little effort, he defeats a Diamond Kingdom army that includes two of the Eight Shining Generals, and later William Vangeance, a Magic Knight captain. His displays of power terrify the normally battle-seeking Luck Voltia and the powerful Sylph, the spirit of wind.
- Devil-Possessed: As a member of the Dark Triad, Zenon is host to one of the highest-ranking devils, who grants him immense power. He can use up to 80% of his devil's power. The more power he draws on, the more devil-like his appearance becomes. At 55% of his devil's power, Zenon effortlessly defeats the four-leaf-clover, spirit-assimilated vice-captain of Golden Dawn. After the first gate of the Tree of Qliphoth opens, Zenon is able to access 100% of his devil's power.
- Dual Mana Attribute: Due to being devil-possessed, Zenon has the ability to use both his own Bone Magic and his devil's Spatial Magic.
- William Vangeance vs. Zenon Zogratis: Win
- Yuno, Klaus Lunettes, and Letoile Becquerel vs. Zenon Zogratis: Win
- "In the face of overwhelming power... sentiment and vengefulness are meaningless. Everything is." 「圧倒的な力の前では... 想いも執念も何もかも無意味だ "Attōtekina chikara no maede wa... Omoi mo shūnen mo nanimokamo muimida"」
- Zenon's grimoire design is the background for Volume 24's cover.
- Zenon's favorite thing is nothing in particular.
- Zenon ranked #20 in the fourth popularity poll.
|Dante Zogratis • Zenon Zogratis • Vanica Zogratis|
|Lucifero • Megicula|
|Gaderois Godroc • Foyal Migusteau • Svenkin Gatard • Sivoir Snyle • Halbet Chevour • Hischer Ongg • Robero Ringert|
|Loyce • Ciel • Yuno|
|Myriad Black • Crevice Men • Archangel Shootdown • Archangel Destruction|
|Fallen Angel Gate • Blackout • Different Dimension Sphere • Unopening Red Room • Fallen Angel Flapping • Spatial Mana Domination|
|Abari • Ado • Cob Portaport • Finral Roulacase • Langris Vaude • Ledior Vaude • Ratri • Valtos • Vide|
|Lucifero • Megicula • Lilith • Naamah|
|Gimodelo • Slotos • Plumede|
|Asta • Nacht Faust|
|Dante Zogratis • Vanica Zogratis • Zenon Zogratis|