Lets see...
-They would be EXTREMELY assertive if their inner values(Fi) were stepped on or violated in any way.
-If they were animals they would be lovable puppies who fiercly guard those close to them and bark at shady characters.
-Being both introverted and energetic/dominant(7w8) they would appear extroverted around their closest friends, but somewhat mild and calm around other people.
-Would actively enjoy and explore a personal activity of thier own solitude: like having an obsession with reading a really good book, or something.
-Combining the natural goodness of an INFP with the fun lovingness of a 7 would result in someone who could bring a smile to anyones face.
-Possible carrers best suited for them would be: artist, writer, teacher, movie directer, or actor.
-Kind, polite, nice, but knows how to take charge when they need to.
I'll add more later if I can think of anything.