This is the problem I have with Zenos. As far as villains go especially with the Litany of Square-Enix Villains He's The most One Dimensional Villain that they've created. What makes an Antagonist memorable isn't oh my god their powers are cool it's their motivations their quirks and mannerisms what makes them tick what compels them outside of the Protagonist Zenos has nothing else that compels them outside of the protagonist, rule an empire nope they want to fight the protagonist , yeah they mentioned merging with Hydaelyn or Zodiark but for no other purpose than challenging the Protagonist to another fight. They cannot exist without the Protagonist which makes them little more than a rather obsessed stalker that just happens to have some cool powers and is stupidly powerful. That is NOT A MAIN VILLAIN these are the behaviors of a Second Tier Antagonist the Right hand of an Antagonist.
Let us look at some of the absolute best Main Enemies SE has made in the past. Kefka: Kefka was driven , scheming , and brilliant, but has such a wild persona that even his own supposed master failed to realize the full extent of his hate and schemes that were kept behind that Jesters Smile. He destroyed the world in his quest to become God and he succeeded the ONLY villain to succeed in his plan to ruin the world rule it and become a living Deity. What made him memorable? What made him such a villain that he had every right to be a main villain? It wasn't just that he succeeded it was that every single thing about him was memorable including his laugh. Zenos doesnt have anything memorable about him aside from a body count Even his introduction didnt stand out. Kefka stood out the moment he showed up in the Desert, and when he poisoned domas water supply killing his men and the domans, when he killed ghestal with the warring triad, when he killed general Leo, when he was finally confronted all of it.Zenos I had honestly forgotten shortly after he killed himself after Shinryu. and by the time the Lakshmi fight in return of the bull he wasn't even a distant memory. I was actually disappointed when he got the Lazarus treatment as far as I was concerned his story was done and he was the major reason for myself at least that the Main Story of Stormblood was boring While the MSQ after the main story was far more interesting until he showed up again. To be completely honest once he's beaten again I'm not going to remember him at all aside from going well that happened. Whats next?
Sephiroth: Again a memorable villain yes he killed people but it wasn't just the deaths that made him memorable. It was everything he discovered his entire existence was a lie, everything that he fought for and believed in was torn form him in an instant and it made him snap he hated it he hated the lies he decided since he had been used to murder for his creators that he would destroy it all again a broken mind like Kefka before ,but Sephiroth's hate was pure he wanted a world just for him and his mother where he wouldn't be used again. Zenos doesnt even have this in his motivations he just likes to kill and fight like a Sociopath it's boring not even remotely dynamic or exciting it doesn't invoke thought or rationale.Like Sephiroth, Zenos has long flowing hair, a penchant for swords, a callous nature , and is reasonably attractive on the outside. However, he doesn't have the same Presence Sephiroth displayed during the story and again albiet for a short while in Advent Children.
Lezard Valeth: The guy that had an obsession with the protagonist of the first game series valkyrie profile but he was so much more than an obsessed stalker he befriended people traveled with them saved their lives all while waiting for the opportunity to strike and empower himself enough to make his obsession his. Everything about him oozed confidence and the Psychosis rarely if ever manifested outwardly though we always seen it simmering on the surface.only occasionally would it break out and in interesting ways. such as pondering if he could become something else might he not also become a god or getting upset at the physical limitations of his body and destroying it so he could continue his experiments unhindered. Zenos cant even do that right he's just flatly written not an interesting character no quirks personality nothing that makes him stand out as anything more than hey theres that guy we gotta kill because.. well look at him.