Sebagni hcs that nobody asked for but I will provide:
Sebastian probably fell first, though Agni fell harder
At first noticing hisโฆ strangely more intense feelings towards Agni, Seb tried to ignore it best he could. This could be seen as weak, something demons are NOT, clearly. Eventually, he comes to terms with it and doesnโt think of it as a weakness as much anymore (in his mind it doesnโt stop him from performing his duties, so it shouldnโt matter)
When Agni realised heโd fallen in love, he basically cried for 3 hours straight out of happiness, and immediately went to tell his prince on how best to confess
Agni is the only human that Seb decently enjoys cooking with, everyone else heโll push out to have the space to himself (cough cough Bard)
When Agni sees Seb having a particularly rough day, heโll give him a thoughtful gift or combine the efforts of the servants to give him a break from choresโฆ even if just for an evening
Seb doesnโt fluster easily at all, but Agniโs sweet/soft, out of the blue comments just donโt mix with his demon brain used to hardcore flirting, so he trips over his words or has to look awayโฆ small things, but big for him (the servants, especially, have never seen him act like that)
As soon as Soma heard of Agniโs affection towards Sebastian, he was obnoxious about it. Trying to be sneaky by leaving them alone as often as possible, or talking loudly about how amazing Agni is whenever Seb is nearby, or almost confessing to Seb for Agniโฆ needless to say, heโs over the moon about it and is very intense
On the other hand, Ciel hardly noticed until Seb almost missed an order from him while engaged in conversation with Agni, and then he loved to tease him about it. Anything used to embarrass or gain the upper hand on Seb is useful, in his mind, so he uses it to his advantage to practically blackmail the demon occasionally (not that he needs to, he just enjoys it, and Seb goes along with it to please him)
Marriage isnโt something that really appeals to Seb all that much, but Agni sometimes mentions wanting to get married in passing, and Seb would bring him the universe on a plate if he asked, so he wouldnโt mind so long as it made Agni happyโฆ besides the โeternal bondโ thing sounds somewhat nice
Sebastian likes his personal space, so itโs a huge sign of trust for him to let someone into his space willingly or see him in a vulnerable way. He appreciates Agniโs respect for boundaries, and so Agni is one of the few people he actually lets be in his personal space and/or see him vulnerably
Classic Sun/Moon dynamic in my opinion
They definitely share recipes from English/Indian cuisine with each other, and Seb sometimes makes Agni some of his comfort foods as a gift
I love the idea that Seb brings little shiny things he finds to the people he loves the most, so when Agni keeps finding coins and other random trinkets in his roomโฆ
If you want more please lmk! I try to keep them within character (to a degree, obviously itโs unlikely any of these would happen) and if you have any requests for other ships for me to do, lmk too. (Also I WILL write a sebagni ficโฆ at some point)
