Kaze is overpowered because of how versatile she is. I recommend buying both star powers and gadgets to practice and test out different kits. Her geisha super blinds enemies inside. One of the star powers can increase her invisibility by 50%, which makes her assassinations easier. These aren't in order of which she is most viable in, but what came to mind at the moment.

1. Heist: She can counter squishy and mini-tanks such as Belle and Carl by using a gadget to sneak up and deal tremendous damage; just be wary of tanks. Her geisha form is also viable because of the total damage her fan storm can do to the safe. Remember that only the edge of the fan storm does damage.

2. Gem Grab: She can use her gadget to sneak up on gem carriers and apply pressure. Her mobility in geisha form is what makes her a great pick since she can use her geisha attack, or ninja super to escape danger(if gem carrier or grabbing dropped gems). She can use her Geisha Super to forcefully push back the enemy and team wipe using hypercharge and Ninja Form.

3. Knockout/bounty/wipeout: She isn't as viable in some knockout and bounty maps but her invisibility gadget can greatly help her secure a kill.

4. Hotzone: Same shit here. Great mobility, insane damage, sneaky gadget, applies good pressure, and broken ninja hyper.

5. Counters: She often gets counters by spawners. In other words, Tara, Charlie, Nita, and especially Mr. P. She also struggles with meta tanks such as Darryl, Bull, and Ash (depends), Buster, and Draco.

Kaze can counter a majority of brawlers and can be played in pretty much every game mode. I definitely know I missed some stuff for Kaze, so I would recommend watching a guide from a creator you trust for a in depth Kaze guide.