- Alucard: Remember: you are the one who chose this.
World Without Logos 
is a Crossover Alternate Universe fanfiction created by Starlight's Poet, who has worked on many other crossovers that feature an alternate outcome or story, despite being set in the same setting or a fused world. This story is a crossover between Hellsing and Seraph of the End.
Rather than being found by Guren Ichinose and being set down the path of joining the Japanese Imperial Demon Army after escaping Sanguinem, Yuuichiro Hyakuya finds himself encountering a stranger clad in red with a fanged smile. This man is a vampire unlike anything he has seen before. After being captured by a vampire seeking asylum in Japan, Yuu is saved by the mystery man, only to find himself on death's door.
"Do you want to live?"
Yuu's answer leads him to a new life. Now, he serves the Hellsing Organization as its new dog, working under Alucard and honing his power, all the while learning of the secrets behind his past, the Hyakuya Orphanage, and the truth behind vampires...
This story contains examples of the following tropes (BEWARE OF UNMARKED SPOILERS!):
- Adaptational Badass: While Yuu was already pretty impressive, him being a vampire and cutting down throes of vampires and ghouls is very impressive. And keep in mind that, at this point in time, Yuu is only twelve. Then again, it is to be expected, since he has Alucard for a teacher. Unlike in his home series, though, Yuu is capable of summoning Asuramaru to fight for him.
- Arc Words: "Remember, you are the one who chose this."
- After the End: ...or so everyone in Japan thinks. In this continuity, only Japan's adult population has plummeted, with Hellsing theorizing that it is most likely because the country was where the taboo had been broken.
- All for Nothing: When Alucard tells Yuu that shooting Ferid in the head didn't kill him, meaning that he never avenged his friends. Thankfully, it only lasts for a few seconds because Alucard lights the fire underneath him to target his rage at the vampires who took everything from him.
- Alternate History: Downplayed. The only real major changes in any point of history was in Berlin where The Major and Ferid first met.
- Alternate Universe: In both cases, actually, as the story fuses together the worlds of Seraph of the End and Hellsing, and because of this, there's a lot of new lore and interpretations and changes to the overall story.
- Badass Teacher: Alucard, naturally. While he sometimes comes off as a Sadist Teacher, he is only trying to push Yuuichiro in the right direction, and always reminding him that he was the one who chose to become a vampire.
- Blood Knight: Downplayed. Yuu is only interested in killing vampires. Just point him at a vampire, and he'll slaughter it to pieces. Asuramaru, on the other hand, will always appreciate a good fight. The Major also qualifies, and dare I say it, embodies the trope to a T.
- Big Bad Ensemble: On three sides: Lest Karr appears to be becoming one, having replaced Krul as the overseer of Japan. Since he has no interest in the Seraph of the Ends and doesn't have an inside man, he's only focused on getting control over Japan and destroying the Japanese Imperial Demon Army. There's also Millennium, which was revealed to be working with Lest, though Schrodinger makes it clear that both sides are using one another to further their own goals. And finally is the mysterious "good sir" and the unknown man present in the meeting between the latter and Schrodinger, who was responsible for implanting the chips creating the artificial vampires, serving as prototypes for the ones used by Millennium and is attacking the Hellsing Organization for unknown reasons.
- City in a Bottle: Played with. Following the taboo being broken and the vampires taking over the country, Japan is effectively cut off from the rest of the world, and virtually doesn't know what's going on with the rest of the world. None of the other countries can act either without causing attention, as they've only managed to provide a flimsy excuse as to why Japan has gone dark and doesn't want to risk exposing the world to the existence of vampires.
- Cool Sword: The Black Demon Cursed Gear Asuramaru would have filled this, had Yuu not subjugated Asuramaru and made it his familiar. Instead, he makes due to with a katana that has been doused in holy water and blessed.
- Dangerous Forbidden Technique: Also doubles as a Power at a Price. Alucard states that Yuuichiro is capable of calling upon his powers as a Seraph of the End, though thanks to his new vampiric nature, his instincts are subdued (which readers of the Seraph of the End manga will know to be a very good thing for anyone involved with Yuu). It is possible for him to tap into the power at its fullest, though Yuu risks being taken over by his angelic side. Alucard also mentions that doing so could be dangerous, as even though Integra and everyone else outside of Japan didn't break the taboo, the Seraphs of the End are still hostile towards humanity because the taboo was broken by human hands.
- Determinator: Being hounded by Alucard's pet hellhound while the man himself shoots at you while you're trying to destroy two dummies that fire back at you? And the bullets, despite being rubber, are laced with holy water? Yuu's solution during this whole thing is to brace being shot in the stomach repeatedly as he fires the shotgun at point-blank range at the last dummy. Oh, and Baskerville's chomping on his arm all the while. Even if it was a training session, it was meant to reinforce Yuu's battle instincts and drill into his head that, as a vampire, certain things don't apply.
- The Dreaded: Alucard. Duh. Who else? Surprisingly, even the Skals are terrified of him, if Krul's reaction to hearing he was in Japan recently was of any indication.
- In Bleeding Hearts, Urd Geales reveals that Alucard was the reason as to why the Progenitor Council was founded, as when he was reborn as a Nosferatu, the Skals had entered into a confrontation with him that led to countless deaths, destroying whatever structure they had back then and forced them to institute the current system.
- Distant Prologue: The first story arc, "Vampire Requiem," takes place two years before the events of Hellsing Ultimate.
- Familiar: Asuramaru. After being defeated inside Yuu's mind when the latter attempted to take control of him and subjugate him, he serves as Yuu's servant and can be summoned to fight with him.
- Freak Out: Krul has a massive one when a subordinate tells her that Alucard was sighted in Japan and sired Yuu to become his fledgling.Krul Tepes: You lie! Tell me you lie! Tell me that was not who they saw!
- The Mole: Guren Ichinose is this for Krul Tepes. If you've read the manga or the prequel Light Novels, Catastrophe at Sixteen, then you'll know his affiliation with Krul is primarily in part due to Mahiru.
- Our Angels Are Different: The Seraphs of the End, also known as the Harbingers of the End, are only summoned into the world when a sacred taboo has been broken. It is also possible for them to become vampires, as demonstrated in the Seraph of the End series.
- Our Vampires Are Different: Due to the setting of the story, there are two kinds of vampires. The Vampires of Seraph of the End are known as Skals, and the Hellsing vampires are naturally referred to as Nosferatu.
- According to various sources in the story, Alucard is regarded as the firstborn Nosferatu, or True Vampire, and thus the "First Progenitor" of Nosferatu Vampires, much in the same way Sida was to the Skal Vampires. It is also confirmed that the Skals were the "first" Vampires to appear, with Nosferatu coming into existence shortly after Alucard did. A evidence, Krul Tepes, a Third Progenitor, is 1200 years old, making her twice the age of Alucard.
- Imperial Stormtrooper Marksmanship Academy: Much to Yuu's dismay, he can't use a gun to save his life, hence why he relies on his katana to help him out. Later subverted, as the only firearm he's good at using is a shotgun, due to its relatively short range.
- It's All About Me: The Major refuses Ferid's offer to make him a vampire because he considers it to be the same as surrendering his entire existence. Rather than be offended, Ferid is actually impressed by this and leaves him be. By default, Skals also serve as this, as with the exception of notable vampires such as the Progenitors in the Council, they have no real loyalty but to themselves.
- Really 700 Years Old: Notable vampires in the story come across as this. Alucard is 600 years old, whereas Krul is 1200, being twice the former's age!
- Red Eyes, Take Warning: All vampires have these eyes, though Alucard takes it a step further, with his Death Glare being the stuff of legends.
- Religious Bruiser: More like religious extremists. If you thought Iscariot couldn't get anymore brutal, whoo boy! The Hyakuya Sect finds this out the hard way when Alexander Anderson himself raids their bases and slaughters everyone inside without mercy. He even claims that they deserve the full brunt of the Nine Circles of Hell. At one point, he even thinks that the vampires have more humanity in them than they do!
- Shout-Out:
- The way Alucard talks to Yuu in their first meeting prior to him becoming a vampire is done in homage to the original TV series.
- When discussing Yuuichiro's refusal to drink blood, Alucard recalls encountering a vampire that refused to drink human blood and instead feasted on animals, particularly sardines.
- Bleeding Hearts also shows that Vampire Requiem appears to be basing itself somewhat on the later half of the TV series, as there are chips that turn individuals into artificial vampires. Given the conversation between the "good sir" and Schrodinger, it's fair to assume that the chips are the prototypes of the ones used by Millennium.
- Spell My Name With An S: In his home series, Yuu's name was properly spelled "Yuichiro Hyakuya." Here, his name is spelled Yuuichiro, similar to what the Light Novels initially used before going back to the original. Whether or not this is intentional is unknown.
