Although the fact that various Devil Breakers are placed across the field might come across as Acceptable Breaks from Reality, on hindsight it is perfectly possible Nico simply launches the ones with rocket functions and have them land at random spots in Red Grave City and later within the Qliphoth tree.
The Devil Breakers being fragile due to Nico packing a lot a power into such a small thing is within possibility. Before the Nightmare adds further Brilliance in that they're all rush jobs when taking into account the one-month time limit before the Qliphoth completely takes over the Human World, and that she has to make the new ones on the fly throughout the entire game.
It might seem odd at first that V would read a quote by poet William Blake as though it were religious scripture. But that's actually the point, since the specific quote is from the Proverbs of Hell, which Blake intended to be a counterpart to the Biblical Book of Proverbs. Essentially, he is reading religious scripture, just that of Hell (or Blake's vision of Hell).
The Faust Hat is a Devil Arm that takes the form of the Nice Hat the Fausts wore in Devil May Cry 4, and that attacks by using your Red Orbs which serve as currency in game. Given the game has microtransactions so you can easily get Red Orbs, it's possible for it to not just cast from Dante's money, but YOURS as well!
It's obvious that V's playstyle is a bit slower than Dante or Nero's. Physically, it might be due to him being physically weaker and requiring his familiars to attack for him, but let's consider another thought. He's seen commanding his familiars to take complex or different forms. It might not be too much of a stretch to say it's not just because V's physically slow, but that he requires time to command his familiars or speak any incantations he has before the attack comes out.
There's also his nature as the human half of Vergil to consider. For much of 3, Vergil despised his being part-human, believing it to be a source of weakness. This is reflected in V lacking the style and brute force Dante and Nero possess, boosted even further by his rapidly decaying body.
V decides to try nearly stabbing Dante in the head with Sparda to wake him up, because he knows whenever Dante's unconscious he always wakes up just before someone tries to kill him.
Dante needs a new power up to beat Urizen. Solution? Stab himself in the chest with Rebellion! After all, getting stabbed in the chest with a sword unlocked a new power the last four times it happened! In this case, Dante finally accepting his demonic heritage inherited from Sparda, not just focusing solely on his human heritage from Eva; he quite literally absorbs Sparda (the sword). That he's facing the family portrait symbolizes that acceptance as he absorbs both Rebellion and Demon Sword Sparda to form his own, Demon Sword Dante. It also symbolizes how Rebellion was the opposite of Yamato - where Yamato has the ability to split demonic power apart, Rebellion has the ability to unify demonic power together. Dante overcame the mental "rebellion" that had been holding him back since 3.
This entire scene is also an inversion of Vergil becoming Urizen. Before Vergil stabs himself with Yamato, he turns his back on the family portrait, reflecting that he is trying to abandon the link to humanity he so despises.
In Devil May Cry 4, Kyrie's song in the prologue (titled "Out of Darkness") is initially sung for praising Sparda, whom the Order of the Sword worships, as a way to commemorate his legend and deeds. But with the events of Devil May Cry 5, parts of the lyrics can now be interpreted as a subtle Foreshadowing to unlocking Dante's full potential and the eventual resolution to his relationship with Vergil at the end of the game. Here are parts of the lyrics being dissected, with the plot points that they hint further in the notes.
Hear the devil's cry of sin, note Refers to the potential Sin Devil Trigger that Dante can obtain Always turn your back on him. note How Dante becomes unable to realize the true power of Rebellion, being able to absorb his true demonic heritage. With the wind you go, Still I dream of your spirit leading you back home.note Dante returns to their foster family home I will give my gifts to you,note While standing in front of their father's portrait, Dante stabs himself with the Rebellion to unlock Sin Devil Trigger Grow your garden, watch it bloom. The light in your eyes an angel up high,note The angel being referred to in the song is Eva, the inspiration for both Sparda and Dante Fighting to ease the shadow side.note As Mundus becomes the dark rival of Sparda, Dante's rival is his brother Vergil, but he does not truly intend to kill him. Hearts will grow though having to bend,note A sibling rivalry exists. The brothers fought numerous times... Leaving behind all things in the end.note ...Yet they reconciled in the end
Alternatively, it foreshadows the ending of the game with Kyrie's words (listen to my voice calling to you) being enough to give Nero the resolve to save both Dante and Vergil (hear the devils cry of sin) atop of the demon tree Qliphoth that Vergil helped create (Grow your garden, watch it bloom) and how Nero has to use his newfound Devil Trigger to ease the long standing rivalry (The light in your eyes, an angel up high, fighting to ease the shadow's side) and how Vergil's journey as V brought his humanity literally back to him,they both reconciled with each other (hearts will grow through having to bend, leaving behind all things in the end).
Artemis and Cavaliere Angelo carry Lady and Trish as Living Batteries respectively. Which makes sense. Artemis was a gun in the previous games so Urizen would want an expert in Gun Fu to wield her power, thus, Lady, whose nickname here is literally The WalkingArsenal, was chosen for her. Cavaliere, on the other hand, has the ability to control electricity and wield his giant sword like nothing. Thus, Trish, who wields Sparda (ironically, the name of the man Cavaliere hates) and uses electricity as her main ability, powers the big purple demon.
It may seem odd as to how [Vergil was able to cut himself into two beings: his demon half becoming Urizen and his human half becoming V. However, one might recall that Vergil's favored weapon is Yamato. Rebellion and Yamato were said to be swords of Sparda with special capabilities. What is Yamato's? The ability to cut through dimensions! This power has been seen to be used to separate as well as combine the Demon and Human World. Vergil using it to split himself into his demon and human sides, as well as them eventually converging back together, is quite possible when one considers its abilities to do so.
Dante and Vergil Offhand Backhanding Nero at the same time isn't just for a comedic scene, it also goes to show that they truly are twin brothers. Twins in real life tend to have the same thoughts and do the same thing at the same time. Even though Dante and Vergil have different ideologies, they would still share some of the same ideas.
Also take a look at Nero's face in the following scene; he's visibly injured on the side of his face that Dante hit but not the other side. Did Dante hit him a little harder in an act of playful revenge for Nero having hit him earlier? Or did Vergil go easier on Nero now he knew that he was his son?
When V offers Dante the job at the beginning of the game's events, he introduces their target as "your "reason"... your reason for fighting." Clever pun using the name of Urizen, while also letting Dante know that it's really Vergil.
Part Fridge Brilliance and other Part Fridge Horror. V's nature as a whole makes a lot of sense (and consequently becomes very disturbing) when one considers the connotations between his nature as Vergil's Human Side and his Familiars being representations of his trauma as Nelo Angelo. Whenever V uses his powers, it noticably wears him down and makes him die faster, and as noted his powers are centered on his Familiars. One could easily connect V's dependence on his familiars as being akin to dwelling on one's own trauma for too long, which undoubtedly damages the person mentally and emotionally. Consequently, V reading his book of poems to revive his Devil Trigger Gauge could be seen as Vergil trying to take solace in what few happy memories and fantasies he had from Eva, but of course due to the reliance of his familiars, it only ends up prolonging the inevitable deterioration of his form.
The Familiars being described by V as being like dreams, as in they can inflict pain but cannot truly kill anything which is why V needs to give the finishing moves, is also disturbing. It can easily be linked to how mental or emotional trauma can cause pain to people, but it doesn't ultimately kill them. It's the people themselves who have to end the misery.
A consistent theme throughout the series is the duality of humanity and demons, and how humanity's desire for justice and ability to love for others channels demonic powers better than the will for domination does. This is why Dante overcame every foe he came up against, even the likes of Vergil, because like Sparda love gave his blade an edge that malice alone could not muster. Nero manages to overcome Dante and Vergil's malice against each other because in that moment love for his father and uncle mattered more to him than anything else, and that singular desire gave him the power he needed in that moment to pursue his justice. Dante, for all his human qualities, was fighting on Vergil's level and operating on hatred, whereas Nero's Devil Trigger was backed by a purity of intention that both brothers were lacking at the moment. Sparda would be proud to know that his grandson learned the lesson he wanted to impart on his sons, and by proxy had to beat it into them to remind them of its value.
V's outfit does seem a little strange, with many people pointing out how gothic and/or edgy it is. [Chapter 2 of the Visions of V manga reveals that V was completely naked after he and Griffon escaped from the twins' childhood home. Griffon had attacked a random mugger when he was distracted by V, thus providing the gothic-like clothes V wears throughout the game.
The themes for the character's fights can be fitting for them if read into by the game's plot.
Nero has "Devil Trigger":
The first and second set of Verses talk about difficulty in restraining one's own rage and anger, and embracing one's own inner darkness in order to survive and kill others. This would fit in perfectly with the entire plot of 4, as well as a comment made by Nero near the end of the game to Kyrie on how all he had was her and Credo in Fortuna. It's been said that he was a bastard child and treated as such there, so it would make sense that he'd feel some self-loathing issues. But by the time of 4, he essentially embraces his nature as part demon if it would mean it'd protect others. It could also refer to the beginning of his frustrations with Dante and Vergil, the former calling him dead weight and the latter having ripped his arm off.
The third set of lyrics talk about the singer being a wildfire that can't be tamed and a refusal to hold back anymore. It could refer to the first time he got his Devil Trigger, as well as not letting his lack of an arm get in the way of exacting vengeance on Urizen. It could also illustrate his use of the Devil Breakers being his view that he has enough power now. It can also refer to how he sets off after Dante and Vergil given his rage at the latter despite the fact that Vergil is his father. The girls are telling him not to go after and kill him, in which he refuses to listen because he won't be tamed.
The final set of lyrics talk about how even when the darkness is gone, the rage isn't over and fighting to get closer, as well as the idea of "like a silver bullet piercing through, I throw myself into you". It could refer to how the closest to family bonding Sparda's family has is beating the living hell out of each other. It could also refer to how Nero is trying to settle the feud for once and for all, and trying to get Vergil to accept him. What's even more poignant is that it's these specific lyrics that are used the most in the final boss theme.
Dante has "Subhuman":
The first set of verses talks about the struggle with inner demons, the difficulty to keep one's power under control and the pain that remains hidden behind a facade. Dante could easily become a ruthless killer to take his revenge upon the demons that ruined his life not caring whether they're truly evil or not, but his humanity still allows him to discern between good and malice. His devil form is a devastating weapon, but the sheer rush of power it grants Dante makes him far more susceptible to going berserk and harming his friends and loved ones, hence he tries to keep it under control. Finally, Dante carries a baggage of hurt after all these years, having experienced a number of personal tragedies, that he tries to hide behind his devil-may-care attitude.
The chorus indicates that Dante still has issues with his demon side, only using it reluctantly when the situation requires it. Because of it, he considers himself an "Omega", "subhuman" due to his mixed heritage, shunned by full-blooded humans. His self-loathing stems from his hatred of demons who made his life a tragedy. Only after accepting himself as both demon and human, Dante finally overcomes his limitation and reaches his full potential.
V has "Crimson Cloud":
A particular recurring line is "Savior! Bloodstain! Hellfire! Shadow! Heaven on a landslide!" Aside from the parallels to some of the story, it also mirrors parts of the entire saga. As noted by a Youtube comment, Savior is Dante, Bloodstain is Vergil's defeat by him, Hellfire is his subsequent entrapment in the underworld, and Shadow is his corruption into Nelo Angelo. Heaven on a landslide refers to the Sparda familial home, and how it was abandoned after great destruction e.g the attempted murder of the entire Sparda family.
Another, non-recurring, pair of lines is "Split myself in two, death is all around. Summoning the power, drag myself through pain!" This obviously refers to Vergil's literal splitting of himself into Urizen, who brings death to Redgrave with his summoning of the Qliphoth, and V, who literally summons his traumas and forces himself to fight as his body slowly decays.
Vergil has "Bury the Light":
For one thing, the entire track is filled to the brim with callbacks to previous DMC games. The first few seconds of the song (at the 0:27 mark) are similar to Ultraviolet, Nelo Angelo's theme from the first game. Around the 6:38 mark, the motifs are similar to Devils Never Cry, the end credits theme to 3, and then, of course, the final minute or two of the song is similar to Nero's theme, Devil Trigger, as noted below. And then the line, "You want this power? / Then come try and take it", is a reference to Vergil's Badass Boast to Dante before their fight here as well as him embracing his humanity as his greatest power much like how Dante embraces his demonic side in this game. "Disappear into the night" is also a reference to his Disney Villain Death in 3.
The line "I am the storm that is approaching" is a callback to Devil May Cry 3, when Arkham tells Vergil that "a storm is approaching" in reference to the coming conflict with Dante and Lady.
Fittingly, the song's chorus sounds very similar to the chorus of Devil Trigger. This is brought to a head in the final chorus, which begins with "Bury the light deep within!", a mirror phrase to "Embrace the darkness that's within me!" While Nero's arc is about learning to embrace his weaknesses and his demonic nature, Vergil is fruitlessly trying to bury his decency and his human nature. The entirety of 6:38 to 7:30 in the song also solidifies Vergil's Woobie, Destroyer of Worlds status since this is a reference to the day his mother died, which is further accentuated by "Cast aside, there's no coming home! / We're burning chaos in the wind! / Drifting in the ocean all alone!" during the breakdown at the end. Ouch. Casey Edwards explained that this ending was not only the final summary of Vergil's story, but also as his final love letter to Devil May Cry as a whole during his final piece on the game.
Interestingly, Bury the Light is over twice as long as Crimson Cloud - the former clocks in at nine minutes and forty seconds while the latter is four and a half minutes. So, in a sense, much like V being the human half of Vergil, Crimson Cloud is only one half of Bury the Light! Oh, yeah. And then this -
(Crimson Cloud) Split myself in two / Death is all around
(Bury the Light) Two souls once lost, / And now they remember
It also connects to "Devils Never Cry" through its theming of light. In both songs, light is synonymous with humanity, and reflects the brothers outlooks on their human half. Vergil, who sees his humanity as nothing but a source of weakness, desires to "Bury the light deep with", rejecting and abandoning it, while Dante's perspective is that humanity is a gift, reflected in the line "Bless me with your gift of light", showing that he believes his humanity is a gift that must be embraced. It also shows that, in contrast with Nero who is more focused on his demonic heritage, the Sons of Sparda are more concerned with their human sides, despite having conflicting views on it.
One reddit poster noticed something that could easily be a happy coincidence or just straight up sheer coincidence regarding three of the boss fights Dante encounters over the all five titles. Dante's final boss fight with Vergil in 3 is in the Demon World, while Dante fights Nelo Angelo in the Human World in 1, and finally the twins battle on top of the Qliphoth far above the earth in 5. Practically step for step on Dante Alighieri and his Virgil passing through Inferno, Purgatorio, and Paradiso of The Divine Comedy.
Why does Vergil mellow out so easily compared to his past self? Because even if he doesn't admit it, part of Vergil has already accepted that Dante is just as good if not better than him. Why else would V comes to Dante for help if he doesn't believe that Dante is stronger than his demonic half?
V reacts in disgust when he sees some knight-looking demons. They remind him of his time as Nelo Angelo.
They could also reflect that he's disgusted that, as Vergil's Human Half, that Urizen would be willing to essentially make use of the trauma as Nelo Angelo to be his foot soldiers. In essence, that without any morality to him, Vergil's ambitions could lead him to be as bad as Mundus, the guy who enslaved him.
Vergil's Boss Subtitle being "The Alpha and the Omega" makes sense as timeline wise, he was the first final boss Dante fought, hence the Alpha. Now he's the last final boss Dante fights, thus, the Omega.
V is the one who kicks off Dante's adventure. Urizen is the one who waits for him at the end. The "Alpha" V and the "Omega" Urizen come together to become Vergil
There's also the fact that "The Alpha and the Omega" translates to "The First And The Last". The fits how he's the first brother (being the elder of the twins) as well as the first one to delve into the Demon World, which all of the playable characters seem to do at some point in game. He's also the first to delve into his demonic nature the most, supposedly getting his Devil Trigger before Dante. He is also the last one to escape the Demon World (given his time as Nelo Angelo), the last one to figure that humanity does have some meaning (compared to Nero and Dante who embraced it first), and, of course, the last Boss in Devil May Cry 3 and 5.
In every Devil May Cry, Dante and Vergil's duels go in three steps. In 3, Vergil easily defeats Dante in their first duel, the two fight to a draw in their second duel, and Dante wins the third duel. This pattern repeats in 1 against Nelo Angelo, and also with Urizen 5. Urizen easily defeats Dante, Dante fights Urizen to a draw, and then Dante defeats Urizen.
Trish is the only person whom V tells his complete origin to, and when finished, asks her if he made the right call in the end. She quips by telling him, "I'm not your Mommy, V. You're a big boy." This has significance on multiple levels because V is the human half of Vergil, and just two missions previously, V admitted to Griffon that the current adventure makes him think about his mother a lot. As anyone who played 1 knows, Trish is a doppelganger of Dante and Vergi's mother, Eva. In that game, Dante eventually realized that Trish only looks like Eva, but the two are very different people. Vergil never had the chance to come to that conclusion and probably wanted some validation from his "mother" after all these years. Especially considering that he thinks Eva chose to save Dante and to let him die.
Notice the difference between V and Urizen's fighting styles. V keeps his distance, comes in for a quick kill with his singular weapon and uses magical canes to hit multiple enemies at once. Urizen, in his final clash with Dante, fights like a brawler accompanied by Summoned Swords-like projectiles. V fights like Vergil using Yamato, representing his more classy yet threatening demeanor, cutting apart the air even from afar, while Urizen fights like Vergil using Beowulf, acting like a savage man using his fists and feet to get close and deal large amounts of damage. Combine the two and, well, it's still Vergil, it's just that he's a master of BOTH.
Nero doesn't get Devil Arms like Dante does. Instead, Nico uses the remnants of the demons he kills to make his Devil Breakers. But some potential Fridge Brilliance and Just for Pun comes into play when you realize that the Devil Breakers are robot arms. Nero acquires literal Devil Arms throughout the game.
There's a certain irony in how Dante and Vergil reach their full power. Dante reaches his full power by truly embracing his demonic heritage, while Vergil reaches his full power by embracing the humanity he had discarded.
V and Urizen are incomplete beings. V has all the skill and finesse of Vergil but none of his pure power, hence his reliance on his familiars to do most of the fighting. Urizen has all of Vergil's demonic power enhanced to an absurd degree but he fights like a savage when facing Dante, which is why he lost to his far more skilled opponent, especially when Dante got the power to turn the tables. Now combined as Vergil, they're finally on the same level as their true foe, but in exchange, they lost their freedom of being their own person.
At the end of the game, Dante trying to kill Vergil may come right out of the blue, considering how well he was getting along with V and seemed to treat him well enough. However, V had just reformed into Vergil right before Dante's eyes, rather than V trying to be the one to kill Urizen. To Dante, it could easily open up old emotional wounds of how Vergil was willing to pay plenty of high costs to himself and those around him to attain power. In 1's prequel novel (which may be canon given Nell Goldstein was mentioned), he killed plenty of Dante's mercenary friends and is responsible for Nell's death, in 3 he's responsible for bringing forth the Temen-ni-gru and the Inferred Holocaust it entailed, and here he (as Urizen) is responsible for the Qliphoth invading the human realm and killing thousands, if not hundreds of thousands of people! It wouldn't be much of a stretch for Dante to believe that Vergil has caused another catastrophe for the sake of his goals (which isn't far from the truth), only made worse by betraying Dante's trust yet again, which also makes it plausible why Dante is dead set on killing Vergil: to not let him be able to cause any more trouble ever again. It's really a good thing that it seems Vergil had finally realized how far he's gone and how much anguish he's caused and wants to attempt making up for it, and a bitchslap from Nero and subsequent pounding from Nero to Vergil to actually end the rivalry and set the record straight.
V noticeably has a much more personal and sadistic kill for the Angelo series of enemies then most other demons, where he grabs their heads to hold them still as he slits their throat. This makes a lot of sense later when we learn his origins and why he probably dislike these enemies more then others.
Doctor Faust is unlike any Devil Arm that comes before it, using red orbs as ammunition. This makes sense when you realise that, unlike every other devil arm, Dr Faust wasn't created from a Devil, but a common demon. A powerful demon, but still pathetic compared to the likes of Goliath and Cavaliere. It makes sense that a weapon created from a being of lesser power needs something to compensate for it's inherent disadvantage.
Dante's disheveled and weathered appearance in this game can be attributed to him not being able to afford to properly groom himself and having his water and electricity turned off. You can also notice that his hair has grown slightly longer after the month timeskip.
Going along with why Nero's Devil Trigger lets him stop Dante and Vergil and beat down both of them, we see that Vergil's new super move is to use the Yamato to change himself into V. Given that positive human emotions channel devil powers better than anything, V, the personification of Vergil's human morality with all of Vergil's post-Qliphoth Fruit devil power makes him a veritable tornado of destruction.
Cavaliere Angelo's first act upon meeting Dante is to throw a motorycle at him and once Dante defeats him he gets a motorycle Devil Arm out of him. Considering he's powered by Trish, it's a very nice foreshadowing and callback to not only who's powering the Angelo but also how Trish and Dante first met.
It is revealed that the Angelo armours were created by Machiavelli, the creator of Artemis and Pandora, by the order of Mundus. However, Trish has claimed that Machiavelli is dead by the time of the DMC Anime. This can only mean that, once he perfected the Angelo armour with Nelo Angelo, Mundus likely killed him. If the Visions of V manga is to be believed, than the Nelo Angelo armour already was created by the end of Devil May Cry 3, meaning not only was Mundus preparing for his war against the Sons of Sparda long before he had Vergil enslaved, Machiavelli was likely long dead by the time of the original game.
The Easter Egg joke ending you earn for beating Urizen in the beginning of the game is funny...until you realize that Urizen is one half of Vergil. Between Urizen's destruction and V's subsequent death due to being separated from his other half for too long, Nero killed his own father. That goes double for the fact that Nero's allies never wanted him to kill Vergil.
And even if V figures out how to merge with a dead Urizen and survive as Vergil he'll still miss out on all the character development he would have had during the game and end up reabsorbing his trauma from the familiars as well. Odds are he won't be as calm or reasonable as he was in the last chapters of the game.
The effects of the Qliphoth on normal humans of Redgrave is brushed over in-game, with a few shots of people getting stabbed by roots and demons and that's it. Generic monster movie destruction. But the dry husks the player encounters all throughout Redgrave tell a wide variety of stories: a couple on a walk, a parent near a balloon stand, a metro car of people commuting home. Not only the citizens were destroyed, but some of their buildings hardly resemble structures anymore. It's almost Hiroshima-like. This sort of widescale destruction is truly horrific, arguably worse than all other series catclysms such as Temen-ni-gru from 3, but it's all hidden under the wacky woohoo pizza man adventures. Take a quiet moment to breathe in the environmental design and it feels like a completely different story.
Dante gains Sin Devil Trigger by stabbing himself with Rebellion, horror kicks in when you remember that Dante based this choice on a guess, he hopes that his father gifted them the swords based on them being Polar Opposite Twins, and remembering that his DT first activated when he was stabbed by Rebellion, if he had been wrong, there would have been another demon, probably stronger than Urizen, rampaging around.
Alternatively, it could've wound up doing nothing productive, which would instead mean beyond initially making him look stupid, Dante likely wouldn't be capable of fighting Urizen; without him being able to take on Urizen, Nero would be dead, and there goes the entire plot, and also probably the world itself. Yikes.
Itsuno has confirmed that Cavaliere Angelo was a new design of Angelo made by Mundus, but it had been abandoned because it required too much power. When you think about it, Mundus' creation Trish happened to be the perfect "battery" for Cavaliere Angelo, implying that by putting Trish in Cavaliere, Urizen just did what Mundus planned on doing to her eventually anyways.