I have yet to see any expansion to the Hares' capabilities besides the surface level explanations, and thus far Zovaras has the aptitude to match them in many of those regards, so I'm going to vote for him.
nicole has a briefcase that shoots both bullets and psuedo black holes, which are essentially just concentrated masses of ether. ether is a substance found within the world of zenless zone zero that, if intaken enough, will eventually turn sentient beings into ethereals, which are basically just mindless corrupted monsters. outside of that, she's very sly, cunning, and tactical. in terms of general intelligence i'd probably say she's the smartest member of the group
billy is an intelligent construct (basically just a robot/android) who's an expert marksman, with equipment that helps him calculate trajectories and aim. his whole shtick is basically just danmaku spam, he spins around and shoots a shit ton of bullets everywhere. he also has access to vital view which basically just gives him enhanced perception whenever he dodges attacks, to the point where things like bullets appear to be moving in slow motion.
anby is a replica (an artificially cloned human) who was also the former leader of a military group, so she's both skilled and experienced when it comes to tactics, planning, and close quarters combat. she specializes in blades and she manipulates electricity, which can obviously stun or shock opponents as she accumulates damage. she also has extremely heightened senses to the point of being able to sense attacks just before they occur.
nekomata is a former gang member who also has a lot of personal combat and street experience. she's nimble and agile, and she has heightened senses thanks to being a cat thiren (basically just a cat girl.)
all of them utilize things like statistics amplification and status effect inducement. they get various damage buffs by attacking, using moves, etc. and they also inflict status effects by accumulating enough damage. nicole inflicts corruption (which i already explained), anby inflicts shock (self-explanatory), and billy and nekomata inflict assault and flinch, which deals massive amounts of damage and also leaves them more prone to becoming stunned)
basically, you're dealing with two danmaku spammers (nicole and billy), along with nicole being able to fire giant masses of ether which, if exposed for long enough, will eventually corrupt you, as well as two adept CQC fighters in anby and nekomata
don't really know anything about the other guy but that's pretty much the gist of the cunning hares. i can elaborate more if necessary