I was looking over the various character profiles and noticed Shinobu's "Oniwaban" rule. I looked through the cards and the rulebook and couldn't find anything related to Oniwaban or Specialty Unit. I'm sure that I'm just missing something obvious, so if someone could point me in the right direction that would be awesome.
The only reference I've been able to find to "Specialist Trooper" so far is in the advancement options for the O-12 Officer ability (Katherine Cho).
I think "Oniwaban" is just a keyword needed to access equipment and prevent others from taking "Oniwaban" based gear.