This is unapproved, for several reasons I am about to list.
Firstly, this has already been discussed and addressed, but it still needs to be brought up. This fruit has three hypothetical uses: black dust, white dust, and flight. The two dust abilities are decided upon depending on the personality of the person who has ingested the fruit. Therefore, this fruit could be sorely abused by someone who, say, has a split personality. Therefore, one of the unsaid 'restrictions' is obliterated by this fact.
Secondly, fruits never change their usage capabilities depending on the one who ate them. Their powers are always identical if they're eaten by a lovable lug, a murderous bitch, or anyone in between. Thus, a fruit that changes its capabilities depending on the personality of the one that ate it just doesn't make sense. Stick with one form or the other, so that this can actually be feasible.
Thirdly, angels have never had the ability to make magic dust, and in fact, have almost never been depicted doing anything other than playing musical instruments and farting beating the shit out of demons. If anything, angels would have wings and enhanced physical capabilities. That's all. The black dust is particularly unfeasible, because I have never heard of ANYTHING halting healing processes. In addition, it stops people from dying even in the most outlandish of circumstances, which is additionally impossible.