MC and Diavolo are at the mausoleum where Diavolo reminds MC he may still expel them from the Devildom afterward and asks why they’d still show him such kindness.
Depending on the chosen option Diavolo either—
• Diavolo admits he has a soft spot for MC and this is why he can’t have them in the Devildom as they could pose a great threat to them.
• Comments that choosing MC as a devilsitter was clearly the right choice
After he guesses that he and MC should learn more about each other but first they must focus on surviving the trials.
Diavolo assures MC not to worry as regardless of the outcome they’ll be fine. MC assures Diavolo he’ll be fine too and he thanks them.
Diavolo admits he feels as though he can trust MC when they say that, even though they are human. He comments that after going from one crisis to another lately he’d never stopped to appreciate that MC is the first regular human he’s spoken with and he’d love to hear more about what humans are like.
When MC asks about Solomon Diavolo says it’d be a stretch to call him a regular human as he’s sort of his own category at this point. He laughs that Solomon would be mad if he heard Diavolo talk about him that way when he wasn’t around.
They move on to a room where a statue of a fairy kind sits. According to legend the lands of the Devildom originally belonged to the fairy kind until a demon served him wine containing his own blood and the king fell into a deep sleep—this according to legend is how the first demon king came to be.
By offering his blood to the statue he can verify if he is of royal blood or not, as the statues eyes should remain closed.
Despite being confident he is of royal blood, Diavolo is still a little nervous. Diavolo offers the fairy king his blood and the statue’s eyes remain closed, confirming he is a rightful successor. Diavolo feels relived but this is short lived as it’s time for the next test—The Testament of Virtue
According to his father it’s different for everyone so his own experience wouldn’t be of any help for Diavolo.
The fairy king asks Diavolo to prove his virtue and they are thrust into one of Diavolo’s memories.
The ground is on fire and Lucifer is crying to Lilith, hoping she will be okay. Diavolo explains they are in the Devildom, the day the war ended and the brothers’ lost their white wings.
Diavolo is upset to see Lucifer like this again. In the memory Barbatos warms Lucifer that Lilith will die soon and Lucifer pleads with Diavolo to save her. He agrees but says it may not be in the way he wants and that his conditions are Lucifer pledge his loyalty to him. Lucifer stutters in shock and Barbatos comments there must be no greater disgrace.
But the memory goes off track and “Barbatos” begins confronting Diavolo about how dangerous this decision was. He compares the brothers to dazzling jewels of the heavens and says Diavolo must want them no matter what.
“Barbatos” continues to taunt Diavolo telling him he wanted the brothers for himself and he knows the reason.
Diavolo pleads he stop and when he doesn’t, he pleads for MC not to listen.
Barbatos says it’s all about being called a “great demon”, someone worthy of being the demon king’s son. He compares them to gemstones again and says Diavolo must want to command a group of demons like that as his father would surely be impressed.
Diavolo cannot refute “Barbatos” and says it’s nit enough to live up to his father’s name but that without surpassing him, his life has no meaning.
“Barbatos” agrees this must be why Diavolo agreed to help this “family” even though it was far too great a risk and asks if this is what you really expect of a demon king.
Diavolo looks disheartened and states that he wants to serve the Devildom and it’s what he was born to do. “Barbatos” interrupts that all Diavolo really wants is his father’s approval.
MC holds onto Diavolo taking him away from “Barbatos” and helps him calm down. Diavolo laments that he is not fit to be demon king and MC tries convincing him otherwise.
He admits that he’s not becoming the demon king for the sake of others but all for himself to earn his father’s approval. He tries emulating his father’s behavior—that of a king—but fears his true feelings will bubble over for all to see. Diavolo chastises himself and apologizes to MC for claiming he was going to expel them from the Devildom for everyone safety.
MC managed to convince Diavolo that he can still become a great king and their belief in him let’s him believe in himself. He tells MC he does genuinely want to be a great king and is able to see what he’s meant to do and who he’s meant to become. With this realization he passes the test.
Diavolo and MC return to the council room and the others congratulate him and are happy for MC’s return.
When asked what’s next Diavolo says he is still responsible for them and any punishments.
He comments that Beelzebub destroyed the palace and attempted to attack him. He adds that they gained from this attack—MC—because without him going through the king’s blood crucible with MC he wouldn’t have realized how important they are and that he feels he’d be making a big mistake letting them go. He adds that it was destiny and even if they rewind time they would meet a thousand different times in a thousand different ways and still end up there.
Because of this he decides he won’t be punishing Beelzebub because he wouldn’t never learned what he had with MC otherwise. He also grants MC permission to stay in the Devildom indefinitely.
The brothers are elated and Solomon wonders what sort of witchcraft they performed on Diavolo.
Later on Asmodeus comments he couldn’t believe how suddenly Diavolo was smitten with MC. Everyone is glad that things are peaceful and decide to eat at Hell’s Kitchen. Solomon asks if he’s included and Lucifer tells him he’s paying for his own meal.
Solomon comments enjoying the food and loving the fact that Lucifer paid for his dinner and he can now brag about it.
Solomon wants to stay and talk with MC longer and offers to make coffee but MC redirects his attention elsewhere.
Solomon says he is shocked by the change that overcame Diavolo and instead a of being continuing to be someone with the weight of the world on his shoulders he is now his confident, bubbly, happy self that they know in the present and MC is the reason why.
Solomon admits when he first met Diavolo his thought was “How could the Devildom possibly produce such an offbeat character?”
MC asks Solomon if they’d influenced the future and he explains time as Barbatos explained it to him. That they are on a branch and a branch exists in which MC says yes to doughnuts and one where they say no, and that they go from that branch to another and endless possibilities exist but they can only choose one—unlike Barbatos who can go from any branches at any time. Solomon states it’s possible that the version of Lucifer and his brothers that they first met are on a branch that theirs doesn’t lead to and wonders what branch they’ll end up on when they return to the present.
Solomon reminds MC of the importance of forging pacts and considers it won’t be hard for them to make pacts again. Solomon comments he misses the present day Barbatos and would like to go back, something he can only do once MC makes pacts.
He asks that as long as MC is making a pact with Lucifer if he could join in as a two humans for the price of one deal.
MC asks why he’d like to make pacts with demons and he says he’d like to make as many pacts as he can. He says he’s doing it to protect humanity as a whole and he wants to be on par with any angel or demon and that it’s his life’s work.
He offers to tell MC a little about his past.
Solomon says he was born in a country where Magic was thought to be evil and that anyone found to be practicing Magic was executed. Unfortunately for him he was using magic when he was too young to know what it was so his scared family—who’d all be punished too—told everyone he had a serious illness kept him away in a basement where he only had one window to look out of.
He comments he was always staring outside the window and one day he made a friend.
Solomon continues about his friend, saying he seems lost and shrieked when they noticed Solomon. “Long story short” they ended up chatting for a long time until his friend’s family showed up. His friend would come over time to time and they’d spend hours chatting through the window bars, until—Solomon isn’t able to continue the story and apologizes to MC telling them he isn’t ready to tell them the story and he doesn’t have the courage.
He finishes with the fact he vowed to his friend to become a good sorcerer no matter what. He reaffirms that he doesn’t want anyone deciding humanity’s future but humanity. He says they have the right to forge their own path without interference from demons or angels and he wants to create a world where he can do that.
He wants to be able to convince demons and angels that they’re equals and that’s why he needs more power and more pacts and would love if MC could help him.
He then decides to turn in for the night when MC says they will find a way to help without betraying the brothers.
In their room at Cocytus hall, MC gets a call from Satan who expresses he believes he’s feeling happiness that they’re still there and wants them to hang out tomorrow.
Immediately after this they get a call from Levi who wants them to come over the following day to play video games.
As soon as they hang up with Levi, Beel calls and says he has a mountain of food he got when MC was in a coma that he wanted them to try and that the pile is currently much smaller and he’d like them to come over tomorrow and try some with him. He add that he has something he wants to discuss.
Mephistopheles is having tea with Diavolo. Mephistopheles tries to skip the pleasantries to discuss more important matters but Diavolo stops him and points out Mephistopheles is scrunching up his eyebrows which surprises him and Barbatos asks if he really wasn’t aware.
Diavolo tells him to relax as they haven’t done so in a long time. Mephistopheles agrees that things have been busy since the celestial exiles arrived. Diavolo laughs that he can sense Mephistopheles’ irritation and asks if he’s had enough sugar. Despite using the entire sugar cup, Mephistopheles says it will suffice.
Mephistopheles comments that he nearly had a heart attack hearing that the House of Lords made him take the King’s Blood Crucible and asks why he hasn’t been told sooner.
Diavolo is remarks that Mephistopheles has always been like a “mini-Barbatos” and he’d nearly forgotten.
Diavolo changes the subject to the devildom changing greatly since the great celestial war. Mephistopheles comments it’s not the war that changes things, or the fallen angels, it’s Diavolo taking over for his father.
Diavolo comments that Mephistopheles looks ultra-intense again and Barbatos recommends more tea. Mephistopheles tells him not to change the subject and begins to rant about his family being the ones who serve as faithful knights and protectors to the demon king and now that his father has retired it’s up to him to protect Diavolo and he will serve as his shield regardless of how Diavolo feels about it.
Diavolo tunes him out and comments that it’s been a long time since he heard that speech and asks Barbatos for more sugar as Mephistopheles counties his speech.
Luke is still in Asmodeus’s closet and beginning time lose hope he will make it out alive. He cries taht he had dreamed of being a seraph but would be fine with much less, like getting to try Simeon’s pancakes one last time. Suddenly he smells pancakes and follows it even though he’s not sure if it’s real. He suddenly falls out of a door which turns out to be connected to the kitchen cupboard. He surprises Simeon who worries first about his pancakes instead of Luke.
Luke eats his pancakes and explains to Simeon what happened. Simeon mentions that the secret passage way is probably a fast route Asmo uses for when he really needs to cheat his diet and that he had the same thing in the celestial realm.
Luke wonders of maybe demons and angels aren’t so different.