How Does Zeoticus Impact Highschool DxD’S Main Storyline?

Honestly, I think Zeoticus gets unfairly overlooked because he dies so early. His actual influence is way more structural than it seems at first glance. He’s not just a dead dad trope to motivate Rias. His decisions before the story even starts are what create the entire premise. By arranging the engagement between Rias and Riser, he sets up the central conflict of the first major arc. It’s a classic noble family power move, linking the Gremory and Phenex houses, but it completely ignores what Rias wants. That pressure is what forces her to act independently, form her own peerage, and eventually fight for her freedom. Without that arranged marriage hanging over her, she might have just been another high-ranking devil heiress playing by the rules. Also, his legacy defines a lot of Rias’s internal struggles. She clearly respects her family and their status, but she’s also rebelling against the cold, transactional aspects of devil society that her father embodied through that engagement. You see her trying to balance being a proud Gremory with being her own person, and that tension starts with him. He represents the old guard—the part of devil aristocracy that sees marriage as a political tool and children as assets. His actions, even posthumously, force Rias, and by extension Issei, to challenge that system head-on. So in a weird way, he’s a catalyst for change by being the embodiment of the tradition they need to overcome.

Zeoticus Gremory? Oh right, Rias's dad. Honestly, I kind of forget about him half the time because he's not on-screen much, but his role is pretty significant in the background lore. He's the head of the Gremory clan, one of the 72 Pillars of the Ars Goetia in the Devil hierarchy, which makes him a big deal politically. He's not really a warrior type from what I recall, more of a noble patriarch and a political operator. His main function in the story, aside from being Rias's father, is as part of the system the main cast operates within. He approved the engagement between Rias and Riser Phenex, which sets off the whole Rating Game arc that's so central to the early series. It's a classic noble-family political marriage move. Later, he's the one who formally recognizes Issei as a member of the Gremory peerage after the whole Riser thing is resolved, which is a huge deal for Issei's status. What I find kind of interesting about him is that he represents the old guard. He's not antagonistic, but he embodies the traditional devil nobility mindset—arranged marriages for power consolidation, strict adherence to hierarchy, all that. He's a contrast to Sirzechs, who's more progressive and powerful in a different way. Zeoticus is like the establishment figure whose decisions create the initial conflicts for the younger generation to overcome. I wish we got more scenes with him just to see the family dynamics, like how he really feels about Rias defying him or about Sirzechs's overwhelming power overshadowing the clan head title. He feels like a character with potential that never fully gets explored, stuck being a plot device for noble politics.

Zeoticus Gremory's memorability is a real slow-burner for me. On the surface, he's just the absentee dad in 'Highschool DxD', right? But that's what makes his moments hit harder. He's a Pillar-class Devil, a family head, but we see him almost exclusively in this domestic, paternal role that's constantly undercut by the show's boisterous energy. The contrast between his dignified, traditional demeanor and his utter, comedic bewilderment at his daughter Rias's antics creates this weirdly endearing dissonance. He's not a warrior we follow into battle, but his legacy and approval are the stakes Rias fights for. That scene where he acknowledges Issei? It lands precisely because Zeoticus isn't a hype-man. His stoicism makes that nod of respect feel earned in a way a more effusive character's praise never could. He represents the old guard watching, judging, and reluctantly adapting to the new chaos his kids are bringing, and that quiet, background tension is more interesting than another flashy fight scene. You remember him because he's the still point in the turning world, the straight man to the entire series' absurdity.

The whole 'rivalry' setup in DxD frankly works better once Zeoticus shows up, because it moves the conflict away from being purely about Issei's personal power struggle and turns it into a duty to a specific household. Before, it was just Issei vs. Riser – a grudge match. Zeoticus's dismissal of Issei and his clear preference for a politically advantageous marriage for Rias reframes the entire Rating Game. Issei isn't just fighting to prove he's strong; he's fighting to prove that Rias's father's entire worldview, his cold calculus about status and lineage, is wrong. It adds this layer of generational defiance. Rias isn't just rebelling against an arranged marriage; she's rejecting her father's operational philosophy for the Gremory clan. That makes the victory so much sweeter, because it's a win for her chosen family (her peerage, Issei) over her birth family's outdated traditions. Zeoticus is the immovable object, the establishment that the underdog has to topple. Without that, the rivalry is just two hot-headed guys brawling over a girl, which is fun but way less thematically interesting. I also think his presence subtly shifts Riser's role. Riser starts as this arrogant, sadistic jerk, but Zeoticus's approval makes him more of a pawn in a larger game – he's the 'suitable candidate' approved by the old guard. It creates a weird dynamic where you're mad at Riser, but you're also kinda mad for him, because he's being used as a tool by the adults just as much as Rias is. It complicates the rivalry in a good way. The real enemy isn't Riser the individual; it's the system Zeoticus represents. That gives the story more room to grow later, because once that system is challenged, it opens doors for other conflicts about tradition vs. change in the underworld society.

Zeoticus Gremory is more than just Rias's dad, honestly, and his power set gets seriously slept on in fan discussions. He's a high-class pureblood devil, which comes with a baseline of demonic energy, flight, and teleportation magic common to his rank, but his real specialty is strategy and summoning. We see this indirectly; his power is implied through his status as the head of the Gremory household, a Pillar family, and through Rias's own abilities, which she inherited. His magic seems heavily oriented towards complex, large-scale ceremonial spells and barriers, not frontline combat. I always pictured him as the ultimate support-class devil. He wouldn't be the one blasting away with Power of Destruction like his daughter or Sirzechs. Instead, he's the guy who sets up the impenetrable ward around the entire manor or opens a stable, massive gateway for an army. His power is administrative and foundational. It's the kind of strength that builds and sustains a legacy, not just destroys an enemy. We never get a full combat breakdown, but his abilities are what let the Gremorys be a power players in the underworld's political scene, which in its own way is a more impressive feat than throwing a mountain.

Honestly? I think the obsession with Lucifer sometimes overshadows how much he's a ghost in the machine, a plot device more than a character in the main timeline. His legacy, the 'Satan' title, and the hole he left are what really drive things. Issei getting Longinus boosted by his evil pieces is a direct consequence of that ancient war Lucifer started. The entire power structure of the underworld, with the new Satan faction ruling, exists because the original Lucifer is gone. It creates this constant tension between the old, cursed legacy and the new generation trying to build something better. Vali's whole deal is being shackled by that bloodline, his entire arc is a rebellion against a grandfather he never met. For me, the most interesting effect isn't the big, flashy power-ups it enables, but the quieter character moments. Rias inheriting a peerage from her brother, who inherited the Lucifer name—that shapes her entire identity and pressure she feels. The plot constantly loops back to cleaning up his mess, whether it's sealing away evil gods he fought or dealing with sacred gears he helped create. He’s the original sin of the setting, in a very literal sense. The story would lose its foundational conflict without that historical weight.

Tiamat is basically the ultimate wildcard in 'High School DxD', and honestly, the story would feel a lot less chaotic without her. She's not just another Dragon King; her neutrality and overwhelming power mean she can swoop in and flip any conflict on its head without needing to pick a side. It introduces this constant, low-key pressure that even the big factions can't fully control. Her appearances usually signal that the rules are about to get bent or broken, which keeps the power scaling from feeling too predictable. I also think she adds a much-needed layer of mystery to the world's lore. We get glimpses of her history and motives, but never the full picture, which makes the supernatural political landscape feel bigger and more ancient than just the current angel-devil-demon squabbles. Her impact isn't in constant screen time, but in the sheer weight of her potential involvement hanging over everything.

I gotta say, the whole Lucifer thing in DxD always felt a bit secondary to me. Yeah, Rias and Sirzechs are technically Gremorys who inherited the title, but the narrative weight is almost entirely on the 'Maou' aspect, not the biblical devil archetype. The original Lucifer is basically a backstory device, a reason for the current power structure. Most of the time, it's just a fancy title that makes Rias seem more important in the peerage hierarchy. They talk about the 'original Lucifer' sometimes, but it's like... world-building seasoning, not the main course. The story is way more invested in the current Maou council and their politics, or Rias's personal struggle with her arranged marriage, than digging into what 'Lucifer' truly means in that universe. It's a legacy, not an active role. Honestly, I think the author knew the 'Lucifer' name carries a lot of baggage and just used it for instant prestige. The real focus is always on the characters wearing the title now—Sirzechs being this overwhelmingly powerful, chill guy who loves his sister, and Rias grappling with the expectations that come with the name. The mythological weight gets traded for shonen power scaling and harem antics, which is fine, but don't go in expecting deep demonic theology. It works for what the series is, though. It gives the Gremory siblings a built-in reason to be central to the mythos without having to constantly reference some ancient, unseen devil.