I don't have a lot so I hope this goes well

-Robin and Finney met in 3rd grade, when Robin Beat up finneys bullies and.Finney helped patch him up

-in 6th grade they hated each other for a while, because of an incident,  but they couldn't stay away from each other, even if they tried

-Robin is older than Finney by a year

-Finney rambles about space and Robin absolutely adores it

-They started dating in 9th grade and Got married at 23-24

-after they got out of the basement, Robin would make jokes about the grabbers outfit before he got kidnapped

-They walk everywhere, most likely because Finney doesn't trust Robin driving (I think you know why)

-Robin proposed to Finn on his birthday, and they got married on Robins Birthday.

-They don't wear socks

-Robin is a Mama's boy, and Finney well............... let's just say he loves his siter very much.

-when Robin showed Finn TCM (Texas Chainsaw Massacre) Finn was all huddled up on Robins chest, Robin found it funny

-Finney is Gay and Robin is VERY Gay

That's all I can think of