Well, if you're still interested in listening later, I'll still give my two cents:
I'm an INFJ female with a fairly developed Ti.
I tell my sister our parents don't love her, threaten to kick people in the face, and think jokes about punching babies are flippin' hilarious. I can also be really analytical, and that's usually how I approach a logical argument because it's more solid and is usually taken better.
It's usually when you get to know me better that I let my Fe really spill all over the floor. Quite frankly, most people don't want to be whined at or frolicked to with happiness and rainbows, so I usually reserve it.
If she's kind, caring, but still a bit dark, then it's possible that she's INFJ, especially if she's read a lot of the descriptions. If she is one, then most of the INFJ profiles would probably be like a brick of understanding hitting her in the face (or at least that's what it was like for me).
So yeah. She just might be.