Waah thank you for the message!

IT THINK IT WOULD REALLY DEPEND ON THE EVENTS LEADING UP TO Them becoming lovers... Like, if everything stays peaceful and Miti confesses normally, and Figaro also went "Yep ok let's date ^^", then Figaro would be the one to invite Miti on their first date. They'd go to a magic bookstore (because Miti is always excited to learn about more things), have lunch, shop for more magic tools (more apparatus to encourage Mitile's medicine-making passion, maybe??), buy souvenirs for Rutile & gang, have dinner, kiss and Mitile could hug Figaro from behind as they ride their broom home???

Or maybe Figaro could bring Miti to a place that Tiletta liked to visit... . Idk, Figaro is the kind considerate boyfriend who wants to make their partner happy first and foremost, so I think he'd take the lead and plan the itinerary to maximize Mitile's happiness.

BUT IF WE GO DOWN A MORE gloomy route where Mitile knows that Figaro doesn't have much to live, then Mitile would be the one to ask Figaro out to a date. "I want to learn more about you" "I want us to create many more memories together" "I want to remember you even if you're gone" "I want to find out ways for us to be as long as we possibly can" Mitile would ask Figaro out to take him to places which are important to Figaro. They'd go to the raging seas of the Northern country, "This is my mana area. There's nothing to see here, so it's boring" (Yes I'm referencing Si Vales Valeo that のり wrote on her pixiv!! It's so good, it filled my head for 4 days straight and converted me to FigaMiti. Thank you のりさん I'm sorry for bringing up your book at least once every year, but it's so good.. It's so good, I cried a lot. Thank you. Please read it here: https://www.pixiv.net/novel/show.php?id=14115233). They can also go to Figaro's old village, "You can't see it, but there's a village buried under us. Remember the story about a magical deer that I shared a long time ago?". Maybe they can even visit the manor/castle/place where Figaro lived with the twins!

"Are you disappointed?" "No, I'm happy to know more about you."
And then they get married in 3 months.

Idk, the possibilities are endless. There's no one true possibility and that's what's fun about this ship!