Considering your requirements, bikes such as the TVS Ronin, Honda CB300F, CB350 trio, Royal Enfield 350s, and Hero Xpulse 210 will serve you well. All are reasonably powerful bikes that can handle the weight of two-up riding and keep your passenger comfortable. 

A test ride of all these machines with your preferred passenger will help you make an informed decision. 

Since this is your first bike, you should ask yourself what sort of rider you are and then pick the machine accordingly. If you feel you enjoy speed and want a sporty, engaging machine, then something like a KTM 160 / 200 Duke, Yamaha YZF R15 V4 / MT-15 and XSR155 will be good options to consider. 

If you want to have a relaxed riding experience and want something stylish, then a Royal Enfield Hunter 350 or TVS Ronin would be a good starting point. Lastly, if you want a single 'standard' bike that can do most daily things, then something like a Honda CB300F would be a good option. 

If you want something that prioritises fuel efficiency, a 160cc commuter from Honda, TVS, Bajaj, Hero or Yamaha would be the way to go. 

Take thorough test rides of each machine you consider before making up your mind up.