The Lovers: Tifa and Cloud
"...... You forgot the promise, too."
You were probably expecting Aeris to be the Final Fantasy VII relationship, right? Truth is, the whole virgin-princess struck down act isn't all that realistic, but the strong childhood bonds between Tifa and Cloud are about as genuine as it gets for the era.
We all remember that special someone from when we were kids and that's part of why the flashback scenes resonate so well with players. Tifa and Cloud don't really make it together as adults, but few young loves ever do.