4, 10 and 20 with Castlevania OT4 for the established relationship ask!
Yessssss! Thank you thank you thank you! Any excuse to daydream about these four...
4. What do they consider to be each other’s most annoying habits?
Trevor stinks and falls asleep pretty much anywhere in the middle of pretty much anything, Greta snores and doesn't pick up after herself (usually her clothes or dishes), Sypha makes too much noise when she eats and starts too many projects, and Alucard is perfect. JK...he's sometimes a bit of a flake and often forgets things or gets lost in his own thoughts and brooding, but that's why he's got Greta to snap him out of it.
10. How do they divide up the domestic jobs?
Alucard cooks, Trevor cleans...they bicker about household matters like paint colors and what to do about the monster spiders in the cellar, while Greta and Sypha run the town. When the baby comes, everyone takes turns for awhile during the hardest parts, but Trevor and Alucard end up taking on most of the daily childcare duties (Trevor is the 'cool dad' that all the kids of Belmont wanna jump on and rough house with, and Alucard is the one they go to when they actually need something or to get snacks), except for magic, which falls to Sypha (their kid makes her first fireball at age 5!), and combat training (is that a domestic job? it is in this town, for sure, and Greta is an excellent teacher!).
20. Do they still flirt with each other?
I imagine all of them continuing to flirt shamelessly until they're old and dead (or immortal...oh no, now I'm sad...), and it being a great source of embarrassment to all the young people of Belmont who knew them, and then a great legend that their founders remained hopelessly thirsty and dorkily in love with each other until their last breath (or until they were sealed away in a secret impenetrable vault somewhere...).