Axio Hybrid
Pros - Reliable and great fuel economy.
Cons - Looks ugly, expensive parts, low ground clearance, boring to drive and expensive.
Prius
Pros - Reliable, superb fuel economy and powerful then Axio.
Cons - latest shape is the ugliest thing on the planet, low ground clearance, dull and boring to drive, and expensive.
Aqua
Pros - Reliable, excellent fuel economy and spares easily available.
Cons - not pretty though facelift is much better now, congested interior specially back seats, poor ground clearance and boring to drive.
Fit Hybrid
Pros - looks stunning much better then all three Toyota’s inside and out, amazing to drive due to its Dual clutch transmissions and powerful hybrid system, much more goodies then Axio, Prius and Aqua, much more powerful then Toyota’s, good fuel economy, high ground clearance.
Cons - expensive spares, not as reliable as Toyotas though now 2015 Fit is perfect, fuel economy wise not as good as Toyota’s.
All of them have poor resale.
If you ask me personally, I would get Fit Hybrid hands down. Seriously perfect Hatchback for all scenarios. It looks gorgeous specially the S package top of the line, much more powerful ( does 0-100 in 7.8 secs ), it is packed with useful goodies, easy to park and manage in city, and lastly great fuel economy ( 20-21 km/l in city )
Second choice is Aqua definitely.