These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Idoko: The Well Girl from "Sei To Shi Wo Wakatsu Kyoukai No Furuido", due to a popular theory that she's Idolfried Ehrenberg's daughter.
Thanako: The insomniac girl from the album Thanatos
Lost-ko: The winged girl on the cover of Lost
Buranko: The Swing Girl from "Kuroki Okami No Yado"
Aohigeko: The wife of Bluebeard from "Aoki Hakushaku no Shiro"
Freud Was Right: As long as there is a hole, Bluebeard will pierce it with his Longinus.
Fridge Horror: "Sei To Shi Wo Wakatsu Kyoukai No Furuido" is a bright, rockish song that really stands out compared to the rest of the album. Even the contents of the song wasn't dark or creepy(there were no deaths or bloodshed, for one). However, during the live concert, the bonus track "Kuroki Shi no Shinkou:" (read:"The March of the Black Death") was played before and after the song. Then you realize the very real possibility of the 'pitch' that the stepmother's daughter brought back being the black death bacteria, thus contributing significantly to the spread of the black death. Granted, this is only one interpretation of it, albeit an uncomfortably plausible one.
In the Live DVD, the silhouette of a rat was shown at the end of the song which more or less confirms the suspicion.
Ever seen a picture of someone with the black death? Screw bacteria, the girl wasn't covered in pitch, she was covered in the blackened dead flesh the bubonic plague causes...
That's a really dumb revenge, if so, though. What would give Well Girl immunity to the plague once exposed to it? This revenge may well have laid out the seeds of her second death.
She is covered in gold; if that was meant literally, she might be okay...
Memetic Bystander: Idolfried Ehrenberg has exactly two lines in Märchen, neither of which have anything to do with the plot. Fans have nonetheless constructed an entire backstory for himnote He's the father of the girl from "Sei To Shi Wo Wakatsu Kyoukai No Furuido". He fell down the very same well that März did, and is the entity that März fused with to become Märchen., which may or may not be exactly what was intended.
Memetic Sex God: Idolfried Ehrenberg. Just look at that man. Soft, golden locks, sassy pirate attitude. He's everything you could ever want.
Launcher of a Thousand Ships: Märchen seems to be teetering dangerously close to this. Within a month of the single's release, people were shipping him with Elise, Elisabeth, März, Hiver Laurant and the PV dancers to boot.
The illustration◊ on the back cover of Elysion ~Rakuen Gensō Monogatari Kumikyoku~. Like the front cover, it depicts Abyss standing behind El, with the five girls from the Abyss tracks standing in a row behind them. However, in this version of the image, Abyss has glowing red eyes and a Slasher Smile, El is smiling eerily and her dress appears to be splattered with blood, and there are depictions of the murders that the five girls committed in the background.
In "Garasu no Hitsugi de Nemuru Himegimi", Snow White's sadistic joy as she watches her stepmother's Cruel and Unusual Death.
"Aoki Hakushaku no Shiro" in its entirety, but particularly the sequence which depicts the previous wives' murders.
The Wham Line in "Yield": "Ah ... but isn't that a head?"
Tear Jerker: In Roman, Etoile's story. It's very likely that it will make you cry or at least shed some tears.
In Moira, track 12. Dear goodness, track 12.
The way Revo performed that scream was heartrending.
Unfortunate Implications/Values Dissonance: The Fridge Horror above from Marchen. The Black Death doesn't actually come from wells. It comes from fleas on rats (presumably the reason they showed a silhouette of a rat in the live DVD). However, it was actually thought at the time of The Black Death that it did, in fact, come from the poisoning of well water. The culprits who supposedly poisoned said well water? The Jews. Caused a lot of deadly pogroms. You can probably hazard a guess that a song from the US (where there are more Jews) would have avoided that.
The song "Tasogare no Savant" is also very difficult to discuss with an American without provoking an argument. Japan does not have nearly as strong a Christian or feminist presence as the US does, so while in Japan, the woman deciding whether or not to bear her child is simply an interesting mechanic through which to discuss the meaning and value of life, an American discussing it would inevitably wind up bogged down in the eternal abortion debate in the US, with many feminists taking issue with the fact that the woman asks the old man for advice on whether or not to keep the child.