Guess: Who Am I? #2

The response for Guess: Who Am I? #1 has been really overwhelming and many of you have come up with the right answer! Thank you for the support. The answer for previous week’s riddle is “BAT” !

So here’s the next riddle. Hope you all like it. !

Guess: Who Am I? #2

Am an entertainer and a spy gone bad,

A manager and a security guard.

Am a cupid who links lovers’ hearts,

A messenger who helps  share all kinds of thoughts.

Am more like a human’s identity,

With this century am a necessity.

My nick name is fundamental unit of lives,

My last name with a ‘y’ is just a bogus!

Well, am running out of time,

Just Guess: Who I Am… 😉

P.S: Please leave your answer in the comment box below. Hope this is quite easy to decipher. 🙂 I also hope you liked it!