Back in my graduate school days at Dear Old Penn, I longed to own a sports car. But my budget couldn't be stretched far enough to justify the purchase of the Datsun sports car, which seemed to be the best fit so far as price and features were concerned. Therefore, you are warned that I have a soft spot in my heart for Fairladies (odd name, but I'll use it in this post for convenience).
Some sources refer to Fairlady 1600s and 2000s as roadsters, but they weren't exactly that, because they had roll-up side windows.
As for the styling, I haven't found a name for the main designer. Regardless, the design is clean -- not excessively fussy like some other postwar Japanese efforts. English sports car designs of the 1950s and designs from other places that were influenced by them usually featured a front fender line that peaked near the front wheel and fell away towards the rear. There was a distinct rear fender and usually a cockpit form for the passenger area. The Fairlady has a hint of rear fender, but no strong fall-off for the front fender. This near-horizontal profile had the effect of eliminating the cockpit design feature.