I know, I know, the real reason for it is fanservice. So shut up about that.
But what I want to know is: are there any in-universe reasons why so many IK females seem to prefer rather skimpy armor? I am unaware of much tactical advantage of leaving one's midriff exposed, and rather good reasons not to (ie. bare regions are very easy to stab/shoot). So why do Denny, Lylyth, Everblight's Ninja Twins, Kaya, Skarre, the Witch Coven, the Druid Wilder, Lanyssa Ryssyll, Dahlia Hallyr, etc. feel the need to run around in warzones wearing rather skimpy clothing?