I like her voice a lot. (so long as she's not sounding toooo much like a child)

Probably INFp?

Otsuka has also appeared in television commercials and acted in the drama Tokyo Friends, released on DVD. Her promotional videos are filmed as mini-dramas. She is qualified to teach kindergarten, and has said she will become a kindergarten teacher if her singing career collapses.

http://www.youtube.com/watch?v=O6J0gB_SztA - laughing

I thought alpha quadra, too.