I think she's at her best with intense performances -- the first time I saw that clip, I thought that she was trying too hard to put emotion into it (largely, I think, because i'm used to Nakamori Akina's beautifully world-weary live version from a few years ago), but Aiai's crazed intensity has an integrity of its own, which comes through strongly in this performance. (I can feel myself slipping into an "Aiai can do no wrong" state of mind, which is probably one step away from out-and-out insanity
)
But her speaking voice (and manner)
She not only
talks like a five-year-old, but she tends to
act like one -- it wouldn't surprise me to find out that she's somewhere on
this list.
Aiai in full five-year-old mode...
If madness made us strong, we would all be invincible.