Ships/tanks/guns/planes as girls potential cyoa.

Commander
Controls up to 5 girls.

Navy
 Decrease cost for different hull classes. Required drawback, If a girl sinks, she'll become an enemy. Big hulls are ship looking.
Tank
 Cheaper vehicle options up to medium, personality traits and pets. Big hulls are fairy driven auxilary parts.
Infantry.
 One girl is a squad, controlling up to 4 copies, squads are now platoons. Personality can be shared by the same girl. Cheaper job and room options. Your transport will double as a rescue squad that saves the wiped out squads. Need a whole squad to man a mech.
AirSpace.
 Airfoce related stuff and base/costume options are cheaper. Expensive room options.

Army branch
 Can be different and combined with commander's branch. Navy commander in land army will have land battleships, Tank with infantry will give you power armor.
 One weapon per girl is taken for free. 1+ item slot per armor class.
 Inbuilt - take 1 item per armor class for free. So, a scout gun girl can have an inbuilt vest, grenades, or a swordmaster, medium can have all three.

Ships
 Weapons, armor and gadgets float around the girl, regardless of their size. Take an extra item per hull class. No inbuilt.
Tanks
 Everything up to medium is connected to the girl via a symbiotic slime. Combining personality and pet options to get girls with animal traits is possible. No inbuilt.
Infantry
 Gadgets are inbuilt. Can take the same girl 5 times. Diminishing returns on some options. Can capture map nodes.
Airforce
 Weapons and armor up to medium are a part of the uniform, costumes have inbuilt slots.

Roles
 Vanguard - high evasion (Examples are destroyers/light tanks/SMGs/fighters)
 Assault - tough armor (cruiser/heavy tank/shotgun/gunship)
 Officer - easier map navigation (cruiser/apc/handgun/heli)
 Fire support - Attack once before battle starts (battleships/carriers/artillery/rifles/machineguns/bombers)

Hulls/armor
Single turret only
 Scout  (jeeps, vest, light helicopter/biplane)
 Light  (patrol boat, apc/tanks/artillery, exoarmor, combat heli/fighter)
Multi turreted
 Medium (Destroyers, Heavy tanks/artillery, power armor, gunships/bombers)
 Heavy  (Cruisers/submarines, heavy gunships, mechs.)
 S.hvy  (Battleships/carriers, orbitals)
 A Dreadnaught/Heavy Carrier, replaces your base. Can take only one.

Weapons
 Scout  Light weapons, grenades
 Light  Propelled cannons, small missiles, heavy machineguns/autocannons
 Medium Cannons, MIRVs/cruise missiles, light energy, bombs
 Heavy  Several combined mediums
 S.hvy  Everything from a railgun, to itano circus, to a doomlaser
 Dread  Your hangar can hold heavy vehicles

Gadgets
 Propulsion
  Wheels/tracks/propellers/hover/jets/on foot(free)
 Defense
  Shields - Air girls get it for no point cost
  Vanguard Shield - Instead of being 2nd hp bar, blocks the first several attacks.
  Ablative
  Stealth
  Point Defense
  False targets
  Swordmaster - deflect shells, or bend beams with a melee attack.
 Offense
  Rangefinder
  AutoReloader
  Extra weapon
  Armed Crew
  Salvo fire - charges then fires all weapons with a buff
  R-ram it in - melee attacks without a melee weapon
 Support
  More crew
  Mechanic Crew
  Map
  Extra ammo
  Extra food
  Hangar - up to medium vehicles
  Critical Shield - Negates 99% damage in a battle if hp is critical. Doesn't use a slot for Ships.
  Salvage - Vehicle parts have evacuation module, saving the girl at the cost of losing them. Doesn't use a slot for Tank/Air girls.
  Autoretreat holosuite - The girl retreats if injured.  Recharges with repair. Doesn't use a slot for Gun girls.

Crew are not people, but fairies that double as pets for smaller hulls. They run around with wrenches, personal weapons, reload heavy weapons, pilot carrier vehicles, etc. The vehicles they pilot are about half as big as human ones.
 Only base staff/companions are people.

Jobs/costumes Jobs can be used instead of companions, or add points for base/personality, but require costumes
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Personality traits.
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Companions
 Base staff
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 Combat
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 Transport
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Base
 Buildings
  Living
  Repair
  Construction
  Mission launch
  Guard towers
  Hvy. guard towers

Setting
Kancolle are about invasion from another planet that used the sunk ships as a template for their forces, because sea bottom offers stealth, while ship girls are reverse engineered from their forces. Really powerful, but if you overextend and a ship girl sinks, that's it. Even entire bases can be bosses.

Tank girls are just girls that symbiotically connect with vehicle parts through a goo. That goo was used by the invaders to turn all animals into enemy tanks, with their leaders being the invaders themselves. Bosses are not much stronger than your tank girls, but you better have somebody who can deal with swarms of minions.

Gun girls are almost human androids that fight the army of drones/captured androids belonging to a PMC that went skynet. Their humanity allows your company to avoid the PR disaster of using drones, so treat them well. Bosses are officers in charge of their armies/bases. Better have a strong base defence as they'll come in force. Attacking needs transport options as infantry can quickly run of ammo/food.

Plane girls are the first defense layer of the planet reverse engineered from enemies. Bosses are space/air/land based. Bombs are useful.

Events/Drawbacks
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Bosses
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