#dialuci headcanons

1. Whenever lucifer is in his demon form, diavolo will always kiss the diamond on his forehead, every.time. he just can't help it, it's one of the many things he finds beautiful about lucifer

2. Whenever diavolo goes to wake up lucifer it's like he's trying to make him drown in sleep even more with how gently and quietly he does it, he'll speak to him in a low and calming tone, he'll give him long gentle kisses all over his face and have lucifer relaxed asf like bro your supposed to be waking him up not making him drown in sleep even more! This is why they are late to school sometimes bcs diavolo does this and they stay in bed too long cuz of it

3. Diavolo loves to lay between lucifers thighs while luci plays with his hair

4. From when they were children till they were teenagers, lucifer actually used to be much taller than diavolo, diavolos head would reach only up to lucifers shoulder and lucifer would always be proud for being taller than the demon Prince, but after they became adults and diavolo became much taller than lucifer, even lucifer has to admit he was very surprised and annoyed when he saw diavolo for the first time in a while taller than him

Even after they got married diavolo STILL makes fun of lucifer cuz of how proud and prideful he used to be about being taller💀

5. I'm pretty sure diavolo is practically the principal of RAD, so. Here for me whenever we finish a test and our teacher grades it its usually passed down to the principal so she can stamp it and also go back on any questions that are right or wrong to see if the teacher made any mistakes, So whenever diavolo does this and he comes across lucifers paper and lucifer has a mistake or a few, dia genuinely can't help but secretly change lucifers answer to the right one so luci dosent lose a mark, he does this to lucifer and lucifer only

6. Lucifer and diavolo visit eachother and sleepover so frequently even if they have work they'll just do it together, and lucifer is mostly the one who goes to visit in the castle since theres much more privacy so luci is there almost all the time unless his brothers cooked up mischief or wanna spend time with him.