* CompleteMonster: Minos, the master of Synapse. First, there's his xenophobia toward humans, referring to them as "downers" and "bugs". He also beats [[spoiler: Nymph]] whenever she fails her orders (or when he feels like it, really) and constantly threatens to destroy her. It's likely that he treats the other angeloids that way too. He also threatens destruction if they don't provide entertainment for him. This "entertainment" includes such things as ordering [[spoiler: Ikaros]] to annihilate the Tower of Babylon and the surrounding city and placing a bomb around [[spoiler: Nymph's]] neck, triggered to explode if she again failed to bring Ikaros back to Synapse. The worst thing he did was probably the time he ordered [[spoiler: Nymph to call on her pet bird and prove her loyalty to him by crushing it to death. After she did so, he stomped her face into the ground while laughing about how "That was pretty fun. I'll save scrapping you until next time." Nymph goes on to thank him for not destroying her, which in all those cases, can easily be interpreted as "Thank you for not destroying me today."]] All this, while wearing a SlasherSmile the entire time. He does these sorts of things after the series fully establishes that the angeloids have feelings and emotions despite their artificial natures. Both of the angeloids in question cry their hearts out after recalling what they were ordered to do. Simply put, the sections that have him in it mean that the plot shows its dark and serious side.
** Recent chapters reveals that he is not just like this towards angeloids. Not even fellow synapse inhabitants are safe from him.
* CrazyAwesome -- Tomoki without a doubt. His latest awesome feat is when[[spoiler: he disciplines Chaos for showing "love" to the kitten with a light smack to the head.]]
** In another episode, Tomoki (who is now [[GenderBender Tomoko]]) is trapped in the girl's bathroom after a failed perversion attempt. Rather than go out and face the wrath of his friends, he [[spoiler: ''flushes himself down the toilet.'']]
*** It's definitely genetics in Tomoki's case. Tomoyo also shows some good CrazyAwesome credentials. For instance, among her many pervesion attempts, [[http://raw.senmanga.com/Sora_no_Otoshimono/67/22/ this is her response]] when hearing from a crying Sohara about her son's HeroicBSOD.
** Yoshitsune as well. His response upon witnessing the harsh treatment [[spoiler: Sugata went through when he tried to visit his family?]]. [[http://raw.senmanga.com/Sora_no_Otoshimono/67/41 This.]]
* CrowningMusicOfAwesome -- The use of Misaki Meguri as an ED theme.
** A background music titled ''[[http://www.youtube.com/watch?v=9kwMRRG7qZM Yuuki no Tsubasa]]''. When it plays, you'll know that something ''awesome'' is going to happen.
** Chaos' theme, ''[[http://www.youtube.com/watch?v=BTDC3POs-YE Epsilon]]''. 'Awesome' doesn't even ''begin'' to describe how awesome it is.
** Astraea's theme, [[https://www.youtube.com/watch?v=bpzAAL_Bqrk Delta.]]
* EnsembleDarkhorse: Hiyori.
* FridgeBrilliance:
** Why is Tomoki so good at emulating a [[MoeMoe Moe]] character? Because he saw his mom do it for 10 years!
** Since "Fallen Down" is about the guilt Ikaros is feeling about being a WMD, she must have come up with the lyrics herself.
* FridgeHorror:
** Tomokis perversions are played for laughs, and he has a stronge ChivalrousPervert streak. Which is good, since between his Angeloids (one of whom specifically has brainwashing capabilities) and their tech, he could do whatever he wanted and no one could stop him.
** Falls into WMG, but angels treat two things like trash: humans and Angeloids. They have the technology to make Angeloids out of flesh-and-blood creatures [[spoiler: Hiyori]], and normally-made ones differ from organic beings only in their [[MagicalGirl pow]][[MagicFromTechnology ers]] and their ears. So...how are normally-made Angeloids made?
** The shooting festival episode suddenly goes straight into nightmarish territory when it's revealed that [[spoiler:Sohara is ''wielding a real gun'' and ''doesn't realize it'']]. Fortunately, [[spoiler: Ikaros [[TakingTheBullet takes the bullet]] for Tomoki and proves to be ImmuneToBullets]]... but Sohara had been active in the "game" for a while at that point... and she's especially horrified when she finds out what she was carrying....
* FridgeLogic
** Normal humans can't survive being dragged in the open air [[http://www.mangafox.com/manga/sora_no_otoshimono/v12/c045/17.html at Mach 17]]. Could be handwaved by the fact that Tomoki is [[MadeOfIron made out of iron]].
** [=S2E06=] -- In the Othello game, Tomoki was playing black. Even if Astraea did trick him into playing himself, black was the winning color. He didn't lose, he won! Baka! Baka!
* HolyShitQuotient: Chapter 55 in spades.
** 56 Takes the previous chapter's quotient, tears it to pieces, burns it to ashes, and flushes it down the toilet.
* {{Moe}}: Ikaros, Nymph, and Astrea.
* ShipToShipCombat: Dear lord, not only is there no OfficialCouple, but also plenty of ShipTease between [[CluelessChickMagnet Tomoki]] and his 4/5 girls, in other words, it's a shipping mine! Particularly vicious is the battle between Tomoki/Ikaros and Tomoki/Nymph shippers: While Ikaros generally had a more important role in the storyline than Nymph, and many readers/viewers consider her a NiceGirl and fairly attractive, not to mention her UndyingLoyalty, she is also an ExtremeDoormat, who still [[WhatIsThisThingYouCallLove doesn't know, what love in particular means]]. Nymph on the other side is beneath her {{Jerkass}} and {{Tsundere}} tendencies also an extremly NiceGirl and unlike Ikaros, she really has TheWoobie bonus going for her (and, by the way, quite some people think of her as ''kawaii''). The Tomoki/Ikaros shippers have a tendency to swoon over Ikaros' hotness and absolute obedience and to call the Tomoki/Nymph shippers {{Lolicon}}s/Pedophiles (never mind the hypocrisy of calling someone disgusting when you like the idea of a girl who will do whatever her "master" commands, no matter what it is, without complaint), the latter ones on the other side usually point out Nymph's positive attributes. In comparison, the Tomoki/[[PatientChildhoodLoveInterest Sohara]] and Tomoki/[[DumbBlonde Astraea]] Shippers are much more subtle and tolerant and often cool enough to laughingly point out that they favor a Darkhorse. Considering [[IncorruptiblePurePureness Hiyori Kazane]]'s status as an EnsembleDarkhorse and the fact that she really is so much easier to pair off with the Protagonist, she was also a ''very'' popular runner, at least until [[spoiler: [[ShipSinking she died]].]]
* SuperlativeDubbing: The dub is very well made. All of the voices fit and the actors all do phenomenal jobs, especially Carli Mosier as Astraea, and the script contains countless {{woolseyism}}s.
* TheyWastedAPerfectlyGoodCharacter: Siren. [[spoiler: Despite only appearing and dying in a span of one chapter, she actually had a neat character design compared to the other Angeloids seen in the story.]]
* TheyWastedAPerfectlyGoodPlot: It was highly expected that Oregano would be Sugata's angeloid, instead of what took place in chapter 52.
* TheWoobie -- Nymph. She has the most scenes with [[CompleteMonster Minos]]. One memorable scene has him, along with some of the other inhabitants, questioning why they made an "Electronic Warfare Model" if the "downers" haven't even found Synapse in thousands of years and whether or not they should just scrap it. This, all in front of Nymph, who is the model in question. If that isn't enough, then how about getting curb-stomped in every battle she's been in, one of which ended with [[spoiler:her wings being torn off?]]
** Whenever the plot rolls, they like picking on her for some reason.
** [[spoiler: Chapter 47 turns CHAOS into this.]]
*** Chapters 69 and 70 further cements both Nymph and Chaos' Woobie status. [[spoiler: Nymph starts lamenting that everytime she makes a friend, she ends up alone, remembering the bird that she was forced to crush and Tomoki going to Hiyori's house earlier that chapter. After Hiyori becomes flustered due to an AccidentalPervert moment shared with Tomoki, her powers go out of control and Nymph calms her down, and it ends with Hiyori wanting to be friends with Nymph, which she happily agrees to...Only to find Hiyori destroyed moments afterwards...Meaning it's another friend that she lost. On the other side of the coin, after chasing Hiyori and destroying her wing and Demeter, Chaos starts to cry once again and Hiyori realized how broken she is...and impales herself on Chaos' wings so she can realize that hurting people is wrong. When it finally dawns on her all of what she had done, she finally crosses the DespairEventHorizon and has a MyGodWhatHaveIDone...And now Nymph's fully intent on killing her]]. Damn...
* {{Woolseyism}}: The English dub contains countless, countless examples. The best example would probably have to be ''all'' of Astraea's dialogue, which overall makes her sound much, much more stupid than in the original Japanese, where she would say stupid things, but she wouldn't sound all that stupid saying them. The dub all around makes her both stupider and funnier. Compare:
-->'''Astraea (Japanese):''' "I came here, planning to eat all of [Tomoki's] food, but there's nothing inside this refrigerator. Why is that?! I'm so hungry!!"
-->'''Astraea (English):''' "I snuck in like a food ninja when nobody was looking so I could eat the yummies, but there isn't anything yummy inside this fridge, there's only me! God, why?!"
** And it also takes away her ability to spell:
--->'''Astraea (Japanese):''' "How pitiful! How absolutely pitiful! I am Synapse's best close-quarters combat Angeloid, type Delta, Astraea."
--->'''Astraea (English):''' "Look at me! This is sad with a capital 'C.' I'm The Synapse's bestest Angeloid in In-Your-Face combat! I'm Astraea, a Delta type, even!"