What were the number of Allied  personnel casualties in the Pacific in
WWII due to attacks by Japanese "Kamikaze" aircraft"?

Hello Nieuport28, 
According to some sources I looked up on the Internet, the total
number of killed by Kamikazes alone are estimated to be 15,000 people.
Casualties includng those aside from Kamikaze victims was 25,000 by
the time of Okinawa's capture.

The Perilous Fight . The Kamikaze Threat | PBS
http://www.pbs.org/perilousfight/psychology/the_kamikaze_threat/

USS Essex tribute page - The Kamikaze
http://ussessex.bravepages.com/thekamikaze.html

F2G Racers Part 2 - “Kamikaze Killer”
http://www.pylon1.com/artman/publish/article_11.shtml
- 5,000 are kamikaze victims in the Okinawa campaign only. 

US Marines History - World War 2
http://www.usmc.mil/history.nsf/0/77f992b2acb682eb852564d70059c642?OpenDocument&ExpandSection=3

Dispatch Archive
http://rwebs.net/dispatch/output.asp?ArticleID=48

The first time Kamikazes were used was in the Battle of Leyte Gulf in
the Philippines wherein, after the sinking of the escort carrier
Gamibier Bay, the rest of the escort carriers were attacked by
kamikazes.


Google Search terms used:
allied kamikaze casualties


I hope this has been a most helpful answer. If you have any problem
with it, do please post a Request for Clarification and I shall
respond. Thank you.