Some tales describe passersby stumbling across the remains, wondering how they got burned.
The description of the Zombie Cop describes how it enacts deadly force on any human being now that it's undead, as opposed to only when the situation called for it while it was alive. It adds that "threats of increased paperwork, pay cuts, or disciplinary action are all useless, as they are no longer government employees."
If the Zombie Cop initiates a conversation (meaning that he's the last demon left on the field and wants mercy), he'll ask, "You don't want to become a Cop Killer, do you?"
Believe it or not, the game over sequence is actually pretty humorous. The afterlife turns out to have quite the queue, and Charon basically tells you, in the most deadpan voice imaginable, to take a number and wait to be called.
In fact, there's so many numbers that Charon actually sells continues just so he isn't so overworked.
Another humorous moment is if you keep refusing to pay, which then he will panic and command the jailer to throw you on a mountain for eternity.
Mundane activities such as "To the Roof" being put under Quests.
(Your) Burroughs excited to tell the other Burroughs that you're becoming the best Samurai from your generation.
Walter teasing Jonathan that he goes to the bakery to get hooked up with girls.
Unfortunately, her manga obsession stops being funny in the Law path, when Merkabah uses it as an excuse to justify mowing her down.
Nozomi constantly complaining about all three times she gets swallowed by demons in her third Challenge Quest.
After the group's adventure in Tayama's facility, they are faced with Yasomagatsuhi, who intoxicates them with a sweet-smelling scent that causes them to, in simple terms, get drunk. Walter declares his icthyophobia in a very hilarious manner, Jonathan announces that he's a cat and starts making cat imitations and Isabeau complains about seeing demons everywhere and eventually leaves with the guys. Finally, you lose consciousness... and when you wake up, you are alluded by Jonathan that you took off your pants and did something with your nose. He is then interrupted by a flustered Isabeau before he could continue.
Walter: "Yeah...I'm Walter. I'm the son of a fisherman...But I'm scared of fish! I must go tell everyone!" -Giggles, then runs off-
Jonathan: "How cowardly of you, dashing off without me! Then I'll admit something as well...In all candor...I am a cat! Meee-owwww! This floor is so deliciously warm!" -Lies down-
Isabeau: "Wh...What is happening? Is this the work of that demon...? Ugh...it's always like this! Demons here, demons there, demons, demons, demons...! It's all so...demoning...!" -Bows to the PC and runs off-
Sometimes when you try to convince male demons to come with you by saying that they'll meet girls, they accuse you of being a pimp and call for the police.
Unintentionally funny with the Hooligan, who logically shouldn't even care about the police.
When a demon that has the "Data" personality (speaks entirely in binary-like gibberish) initiates Demon Whisper, Flynn's response when he's finished is a confused, "...Yes?"
The defeat of Peallaidh leaves behind his head... which gets tossed around round-robin due to how damn horrible it smells. Isabeau is the first to pick it up, before handing it over to Jonathan. Jonathan quickly gives it to Walter, who makes a crack about Jonathan and Isabeau being squeamish and touts the head as a trophy... before getting hit by the smell and giving it to you. The game's message log even announces each character "obtaining" the head in turn, as if they were receiving a plot-critical item you would normally get.
Pluto completely malfunctioning when you defeat it, it usual Machine Monotone turning into something halfway between a crashing program and dubstep (with a bit of Youtube Poop too).
And then the moment you arrive and show the guard the proof, he apologizes in the most deadpan possible manner and lets you pass without another word. Walter's reaction is priceless, especially so when you consider what the "proof" was (a matchbox).
This happens even in the Chaos path. Either he hasn't bothered to get back in touch with his superiors in Mikado, or he's decided than helping himself and you to more mystic relics is more important than fighting you for having turned coat.
Akira the demon calls Jonathan and Walter with names. He first calls Jonathan a "Goody-Two-Shoes" which he doesn't understand, but Walter is seen smiling in the background...and then Walter gets called "bad boy," making Jonathan smile instead.
Hugo turns out to be a Henpecked Husband. Hearing him vent about his wife while attempting to remain civil (as well as TRYING to avoid giving away the fact he's the "acquaintance" he's talking about) is quite hilarious.
Recruiting demons in general, natch. One such example is trying to recruit a demon with a "beast" personality, where they ask the player to dig into the ground. The three possible responses given to the player?
There's another example of this, wherein the demon tells you that you have no choice but to bow down to him. As such, you get three choices all telling you to bow down.
Some demons can propose you a rather loaded question: which are stronger, humans or demons?
Other demons command you to die. If you obey ("X tried to die!") then either they'll become so disgusted with your disregard for your own life they'll leave, or they'll be so shocked at it that they'll immediately join you to keep you from doing it again.
Some demons will command you to massage their shoulders. You have the option to massage your own shoulders, and if you're lucky, the demon complains that you're doing it wrong and offers to join you to teach you the proper technique.
The terminal guardian is a pretty hilarious guy. He appears differently with each appearance (once as a woman), and after being defeated the first time, freaks out each time after when he realizes that it's you once again to take his terminal. And each time he swears that next time things won't go like that. Later on, he becomes much more affable though still overconfident.
At the 9th terminal, he will summon Mara to battle you, which is a funny moment in and of itself. He delivers this line:
"Intuitive Man": "Even you won't be able to beat off this magnificent schlong. Hehe, get it? Beat off?" "Anachronistic Man": "Even one such as thou shall ne'er beat off this magnificent member."
And once you beat Mara...:
"Intuitive Man": "Huh. I guess it really is all about how you use it."
Those chatting skills that lets you get macca, healing, or reducing press turns from demons? You can use them on bosses. Even on the The Whites!
The VR missions have some fun gems:
In Training Battle 4, Pyro Jack introduces you to the "Jack Brothers +": himself, Jack Frost, and Jack The Ripper, just like before, but with the addition of Hairy Jack. He defends the odd inclusion, pointing out that he couldn't find any other Jacks.
In the Law or Chaos paths, try resting in the barracks or having lunch at the Hunters' Association. Merkabah and Lucifer will still walk up to you to wake you up, or wish you luck while eating the "ersatz" concoctions, as if it they were still your old partners. Merkabah declares eating at the Hunter's Associations a form of bravery, and Lucifer describes the food as a fallen thing.
While the visits to Blasted and Infernal Tokyo are in general pretty dreary, and naturally so because the White are trying to drive Flynn across the Despair Event Horizon, there's one moment in the latter level that's pretty amusing, involving going into a lab run by demons and getting sterilized... by a Kanbari, in a process that sounds like throwing up.
In the Cathedral of Shadows, if you accidentally try to fuse a demon without selecting any skills for it to inherit, Mido makes a hilariously flippant, miffed-sounding "MMM!" noise.
When you get to Shinjuku in Blasted Tokyo, there's an item shop and weapon shop that are functionally the same as other shops, but their respective clerks are wearing the standard human garb of Blasted Shinjuku. Hearing the masked weapon clerk make the exact same snarky lines as his normal Tokyo equivalents is hilarious.
Walter: "No, I can see that Navarre is... special."
Isabeau joins you in finding Navarre simply because someone has to dispense first-aid after Walter is through with him.
And then there's Walter opinionation that with a helmet on, Isabeau would be taken for a man. Which gets returned when she states that, as the only woman and the only member of the team not to be charmed by a boss, she is the only one qualified to give a complete report of the situation.
Trying to visit the bakery after the plot-mandated visit will result in Burroughs telling you that you're leaving before the baker has a chance to notice you.
It's less funny when he succumbs to the books and becomes Dantalion.
When fighting Mitamas in the three Anti-Frustration Features DLC quests, try using Desparate Hit on them. You'll do zero damage, but they don't count as blocked attacks, and you can still get Critical Hits for extra turns!
If you have Alice in your party and you refuse to let her learn a new skill or change a skill, she asks you to die for her. This reaches maximum irony if the skill she is trying to change is Die for Me!—in other words, her own Signature Move.
Speaking of Alice, you can learn Die for Me! via Demon Whisper. Now imagine you/Flynn running around shouting "Die for me!" to demons.
In the "Experience of the Afterlife" DLC quest, Charon's jailers note that there's been an influx of new dead lately because they don't have enough experience. Which can be taken to mean that they aren't Level Grinding hard enough, and that the jailers are lampshading the game's Nintendo Hard difficulty.
When you do a Reincarnation Start New Game+, you keep the level you had when you finished the final quest of your previous playthrough. Quest EXP is dependant on your level. Your first quests in a new file involve recruiting demons, so once you recruit a low-level demon or two, the next quest you finish will result in that demon getting the same EXP as you, and the EXP reward is enough to give them at least 20-25 levels.
Also on a Reincarnation Start, if you kept the Black Demonica from your last playthrough, put it on during the Black Samurai arc and watch as the citizens of Mikado completely ignore the fact that you're dressed exactly like their number one enemy.
After the Black Samurai is captured, Hugo orders the Samurai to continue scavanging Tokyo for mystic relics, an order that leaves many Samurai upset, Walter included. His response?