Best Friends
Juniper Montage / Wallflower Blush
Sci-Twi / Sunset Shimmer
DJ-PON3 / Lemon Zest
Photo Finish / Sunny Flare
Lyra / BonBon but do i really need to even point this out

Best Friends
Juniper Montage + Starlight Glimmer
Juniper Montage + Sci-Twi
Rainbow Dash + Indigo Zap
Rarity + Sour Sweet
Rainbow Dash + Sunset Shimmer
Pinkie Pie + Sunset Shimmer

Family
Juniper Montage & Vignette Valencia (Cousins)

More will be added when revealed.
Also subject to change~ :3

Huh. I'd think it would go without saying that all of the Mane Seven are best friends. =P

6938931
And thus you'll notice I didn't say it.

The ones listed above are the ones the MCU has expressly featured the dynamic of in any of its installments.

6938934
Fair point, you got me there.

6938934

I remember most of these coming up, but I'm blanking on Lyra and Bon Bon and can't decide if I'm overlooking something or if that's just in there because well yeah

edit: Dash/Zap being on the second tier also prompted me to go back and pick through your catalogue and realize just how many EG stories you have that still weren't folded into the MCU, good grief :D

Is there any chance the MCU can have crossovers? XD

Also, Juniper has an uncle, but I assume you didn't add that for how obvious it was?

6939113
Dunno (yet). Keeping it "simple" for now.

6939115
More or less. As suggested in an earlier reply, a lot of the list above is to keep track of things I've highlighted in my writing as opposed to stuff canon's laid down already.

6939198
Got it, and I asked because I would like to help expand this wonderful universe.

Maybe make some spinoffs, I don't know. XD