Head cannon because i have nothing better to do

Meilodas

I believe that Meilodas was very stubborn as a child and never really lost the stubbornness just got better at hiding it like for instance I think that there was like one time it came up around Elizabeth that really clued her in to it but before that she had her suspicions like I think this is how it would've played out:

Elizabeth: Sir Meilodas it is getting really late if you don't go to sleep now you'll be very tired and upset tomorrow
Meilodas: No I won't I'll be fine Elizabeth please go to bed
Elizabeth: But Sir Meilodas you-
Meilodas: I said I'll be fine so back off
He proceeds to stay up the entire night only to be pissy the next day and kept almost falling asleep but stayed awake the entire day and tried ( failed) at hiding the pissy part just so he could be right.

I think he did actually have 2 brothers but one died when he was like 4 years old and it was a stillborn so it didn't matter to him but that's why the demon king made Estarossa his brother and not just a comrade
Meilodas and Zeldris have always been close but Zeldris refuses to admit it but when they were younger before the Ten Commandments Zeldris would always complain about whatever bullshit happened to him to his older brother over Hot Chocolate but acted clueless the next day when Chandler was confused as to why 4 packets of hot chocolate were missing when nobody drinks it but him!

When Meilodas first got the sins together he was still rather distraught over what happened to Liz and Danafal that he was cold and ruthless the first couple months but after Diane and Ban joined he started to mellow out but because of how he acted at first it was the reason he was bestowed the title the dragon sin of wrath ignoring what he did to his previous kingdom because they didn't know what had happened.
When he had sought out King to offer the invite he didn't accept it the first like 2 times but after the first time he asked to be the guard outside of Kings cell and the time King finally accepted Meilodas was in to deep to act like he wasn't trying to recruit someone so he staged a fight and made a break for it but he forgot King so he had to turn around after like 3 miles ran back and threw King over his shoulder because he didn't have a key to his cuffs and somehow blew up the wagon that him and another two guards were escorting the prisoner from one place to another.

(TBC)