Could you do a headcannon of how a game of truth or dare between the seven brothers go?
-- Caramel: Spoiler alert; the House of Lamentation would be destroyed at least once. --
How the brothers play truth or dare
Usually picks truth during his turn because his brothers dare him to do outrageous things like acting like a dog for five minutes (which, incidentally, turned out quite poorly for the dare-r (Mammon) because Lucifer bit him several times saying he was a hunting dog. He can be semi-playful when MC is present.)
A bit of a copycat in that he'll ask the same dare or truth as someone else. He's not usually interested in the game unless a) his brothers have done something wrong or b) MC is playing.
Under the circumstance that MC is playing, depending on their relationship status he will certainly use the game as an excuse to flirt. Which may occasionally lead to a more private game of truth or dare.
Almost always picks dare because his brothers ask him pointed questions like "did you steal x from me a year ago" or "how much do you love MC" (He often tries to cheat either way.)
As per usual, he's in it for profit, so whether the brother asks truth or dare, he's trying to make money off it. Naturally, Lucifer drafted a set of rules, which was signed by everyone but the person in question to prevent something like having dares filmed.
If MC is playing, he has a habit of daring them to do things that he isn't necessarily prepared for, e.g. kissing his cheek.
Leans towards picking truth because he usually thinks words are less embarrassing than actions, but he surprisingly never runs from the challenge as if he needs to "win" truth or dare.
Many of his truths and dares have to do with Hana Ruri, though other topics unrelated to anime are not off the table. He once asked Belphie, who had chosen truth, to rate the last movie he made him watch. The house was soon flooded.
If MC is playing, he unintentionally tones down his truths and dares to spare them from embarrassment until someone points it out.
If he's in a good mood, he'll pick either truth or dare as a 50-50 split, but if he's in a bad mood, he will almost always pick truth.
He will dare Lucifer even if Lucifer has picked truth and proceed to call Lucifer chicken. Oddly, one truth he asked of Lucifer was "Do you secretly consider me your son?" (to which Lucifer replied: "If I had a son like you, just counting the number of times you've said 'I hate you.' wouldn't have been enough.")
If MC is playing and depending on how many ridiculous requests they've already gotten, he will likely err on the mundane side. Nevertheless, MC can expect to meow several times.
Gets really excited and sometimes asks for both a truth and a dare at the same time so he can decide which one is more exciting. He will, however, cheat if he bites off more than he can chew.
Frequently asks for some hot gossip if he thinks that the given bro will give it to him. If the subject chooses 'dare', his standard choice until provoked (i.e. getting a particularly mean dare / having to confess to breaking Belphie's telescope by accident.) is to express some form of fawning over him.
If MC chooses to play, he will throw affectionate gestures like kisses into the mix, and that kiss does not have to be directed towards himself. By popular begrudging opinion, Lucifer also put restrictions on this.
Often asks his brothers which option he should pick, particularly Belphie, in part because he doesn't have much to hide, nor is he usually embarrassed.
Like Asmo, Beel will not up the ante unless one of his brothers makes him do something cruel. Unlike Asmo however, Beel's questions and dares are almost all mundane with a few uncomfortable exceptions relating to the brothers' pasts.
If MC plays, little else changes; dares typically consist of Beel just asking for favors like getting him snacks, and truths have a 50% chance of being questions he already knows the answer to.
Tells Beel to pick for him, which is more often than not an alternating truth-dare-truth-dare pattern. He's usually half-asleep anyway, so does it really matter? He'll just sleep through it if he doesn't feel like it.
Belphie is almost always the instigator to the biggest fights both when asking truths and giving dares, and he is the most likely to make absolutely ridiculous demands unless it's Beel's turn.
When MC plays, whether or not he shows mercy purely depends on how much he's been allowed to use them as a pillow that week and what MC has already told him to do.