In a setting where there are multiple different species of aliens (alongside humans), humanity was forced to quickly adapt to aliens and invented various war machines.
Among them are several types of space-capable powered armor, intended to be used during the rare infantry battles (that is: when people are NOT lobbing rocks on each other planets and want to conquer them instead).
I imagined several different armor shapes, for various tasks, one of the shapes is kinda insect-like, with a big rear like a Wasp, Bee or Ant. I thought it would look cool but I can't think of any good reason to make armor in that shape when the occupant is human.
Anyone here has any idea why someone would want to make armor like that?
EDIT: I will add some constraints to the question to avoid it being a "infinite list of things".
The setting in question is based on a short story I read once, where warfare was based more or less if the aliens were carnivore, herbivore, etc... One relevant thing to potential camouflage here, is that humans are currently trying to hide the fact they are predators, because the biggest group of hostile aliens are herbivores that will attempt to wipe out of the universe any space-faring space species that are predators and thus would want to eat them.
The humans are allied during this point of the story with only one species, that is a sponge. The sponge are giving technology to humans, this result in a lot of weirdness (for example sponge has no hands so they don't have the concept of interfaces with buttons or handles).
These suits cover the whole body and are armoured, but are lighter than the typical "mecha" styled suits that also exist, but are heavier than light infantry that uses normal "modern" military gear (those are obviously intended for planets with compatible atmosphere.)
Things that I am imagining that affect suit design is combat capacity, stealth/information warfare capacity, recon capacity and life support.
Real world insects have several "life support" organs in their rear (for example whatever they use to breath), but I don't see a reason to have those in the rear instead of having them in a backpack.