History TearJerker / DeliciousInDungeon

** Laios' general attitude belies his honestly depressing backstory. When Falin developed her magical abilities, the villagers treated her extremely poorly, which Laios felt even harder than she did. Their parents only stood by and let the abuse happen. It got to the point where he would imagine monsters sacking the village and killing everyone but him and Falin, which is where his reverence for monsters came from. When their father demanded that Falin leave the village, that was the last straw for Laios, who left first for the military in protest. He couldn't make it in the military, though, and he eventually ran away from that to become an underpaid, overworked worker in a caravan. He couldn't even be bothered to clean himself. Meanwhile, Falin was sent to a magical academy ([[PoorCommunicationKills which is what their father meant by saying that Falin would leave the village]]), where she ended up much better off than Laios, learning how to control her magic and meeting Marcille and a bunch of other friends, meaning his leaving the village for his sister's sake was AllForNothing. When Laios gets the opportunity to see his sister again, Falin is so shocked by his shoddy conditions that she left the academy to join him. Only then did things start looking up for Laios, but even then the siblings spent a while in barely-acceptable living conditions before they became adventurers.

** A bonus manga included with the Blu-Rays of the anime show a WhatIf from Laios' imagination where he was eaten by the Red Dragon instead of Falin. Despite Falin's urging, the rest of the party give up on saving him due to them believing he's already too far gone. Despite this, Falin charges down the dungeon by herself, a thought so terrifying to Laios that he snaps out of his daydream. It says a lot about Laios and his self-worth that he believes that none of his friends would come to his rescue if he died, but it says more that he not only believes that Falin would be just as desperate to rescue him as he is to rescue her, but that he finds this to be an even more terrifying prospect.

** Laios' general attitude belies his honestly depressing backstory. When Falin developed her magical abilities, the villagers treated her extremely poorly, which Laios felt even harder than she did. Their parents only stood by and let the abuse happen. It got to the point where he would imagine monsters sacking the village and killing everyone but him and Falin, which is where his reverence for monsters came from. When their father demanded that Falin leave the village, that was the last straw for Laios, who left first for the military in protest. He couldn't make it in the military, though, and he eventually ran away from that to become an underpaid, overworked worker in a caravan. He couldn't even be bothered to clean himself. Meanwhile, Falin was sent to a magical academy ([[PoorCommunicationKills which is what their father meant by saying that Falin would leave the village]]), where she ended up much better off than Laios, learning how to control her magic and meeting Marcille and a bunch of other friends, meaning his leaving the village for his sister's sake was AllForNothing. When Laios gets the opportunity to see his sister again, Falin is so shocked by his shoddy conditions that she left the academy to join him. Only then did things start looking up for Laios, but even then the siblings spent a while in barely-acceptable living conditions before they became adventurers.

* Laios' general attitude belies his honestly depressing backstory. When Falin developed her magical abilities, the villagers treated her extremely poorly, which Laios felt even harder than she did. Their parents only stood by and let the abuse happen. It got to the point where he would imagine monsters sacking the village and killing everyone but him and Falin, which is where his reverence for monsters came from. When their father demanded that Falin leave the village, that was the last straw for Laios, who left first for the military in protest. He couldn't make it in the military, though, and he eventually ran away from that to become an underpaid, overworked worker in a caravan. He couldn't even be bothered to clean himself. Meanwhile, Falin was sent to a magical academy ([[PoorCommunicationKills which is what their father meant by saying that Falin would leave the village]]), where she ended up much better off than Laios, learning how to control her magic and meeting Marcille and a bunch of other friends, meaning his leaving the village for his sister's sake was AllForNothing. When Laios gets the opportunity to see his sister again, Falin is so shocked by his shoddy conditions that she left the academy to join him. Only then did things start looking up for Laios, but even then the siblings spent a while in barely-acceptable living conditions before they became adventurers.

* Laios' general attitude belies his honestly depressing backstory. When Falin developed her magical abilities, the villagers treated her extremely poorly, which Laios felt even harder than she did. It got to the point where he would imagine monsters sacking the village and killing everyone but him and Falin, which is where his reverence for monsters came from. When his father demanded that Falin leave the village, that was the last straw for Laios, who left first for the military in protest. He couldn't make it in the military, though, and he eventually ran away from that to become an underpaid, overworked worker in a caravan. He couldn't even be bothered to clean himself. Meanwhile, Falin was sent to a magical academy (which is what their father meant by saying that Falin would leave the village), where she ended up much better off than Laios, learning how to control her magic and meeting Marcille and a bunch of other friends, meaning his leaving the village for his sister's sake was AllForNothing. When Laios gets the opportunity to see his sister again, Falin is so shocked by his shoddy conditions that she left the academy to join him. Only then did things start looking up for Laios, but even then the siblings spent a while in barely-acceptable living conditions before they became adventurers.

** In the second World Guide, Lycion explains to Izutsumi that while ''he'' is a human with a beast soul inside of him and can take on a hybrid form, ''she'' is actually a beast with a human soul inside her and always in her hybrid form. She doesn't understand him and maybe that's for the best - there is some BackstoryHorror considering how some mystery mage put a child's soul in a monster. No wonder she can't remember her parents, which also means that she was never loved like a child should be loved and the Touden party really is the best she's ever been treated. And, all along Izutsumi has been [[IJustWantToBeNormal wanting to have her curse removed]] so she could be human, but that just isn't possible.

** In the second world guide Lycion explains to Izutsumi that while ''he'' is a human with a beast soul inside of him and can take on a hybrid form, ''she'' is a beast with a human soul inside her and always in her hybrid form. She doesn't understand him and maybe that's for the best - there is some BackstoryHorror considering how some mystery mage put a child's soul in a monster. No wonder she can't remember her parents, which also means that she was never loved like a child should be loved and the Touden party really is the best she's ever been treated. And, all along Izutsumi has been [[IJustWantToBeNormal wanting to have her 'curse' removed]] so she could be human, but that just isn't possible.

** Despite all the pain he caused, at the end of the day Thistle was just a young elf trying to help his friend and king, who ended up being manipulated by a demon. Watching him die in Yaad’s arms, too far gone to truly understand the situation but at least able to achieve some level of peace thanks to Yaad’s deception, is absolutely heartwrenching.

** As they finish eating the dragon half of Falin, Laios solemnly recounts how the Winged Lion cursed him and thinks that because of the curse his sister won't come back to life.

** Laios [[MercyKill mercy killing]] Falin. While the party did already plan on killing her to eat her dragon half in hopes it would revert her to a human, they're none too happy about what they're doing, especially Laios, considering he opted to do the deed himself due to the guilt he felt from having gotten his sister into such danger in the first place.

** The Winged Lion had created a doppleganger of Marcille's dead father, which she had been repulsed by, but in Chapter 80, already starting to be corrupted, she uses him to herd the party into a kitchen and keep them from escaping. In this chapter the doppleganger tells the party about Marcille's childhood memories - as a half elf she aged strangely, and while her father lived a long time for a tallman, he hadn't been young when she was born. In most of her memories of him he was old and sick. Marcille vividly remembers her cheerful mother becoming overwhelmed and distraught when he was no longer able to eat his favorite food, and telling her at the funeral that she ran at a different pace than everyone else, and from now would have to watch others pass before her.

** Marcille suspects that Laios gave her his neck guard purely as part of a gambit to ensure that the team's smartest member would be able to figure out a way to beat the Dungeon Rabbits...while everyone else dies. She ''does'' succeed, but this utterly breaks Marcille once the adrenaline runs off and she's faced with the corpses of the friends she's made over their adventure. It's even the page image, and informs much of her following character arc and her fear of outliving her friends.

** Both Marcille and Kabru's {{Freak Out}}s over the Winged Lion advancing on the surface world after contracting with Laios. Both are in full ItsAllMyFault mode, with Marcille regretting her ever trying to resurrect Falin and despairing over the apparent end of the world, and Kabru thinking the whole incident is ''Laios's'' fault and regretting not following his instinct to kill him before everything got worse.

'''Spoilers are unmarked.'''.