Thats what i like about Mohan's characterization that he is shown to completely opposite to Amar except honesty. Its obvious his profession as a investigative reporter will help megha in this case. Initially megha will be irritated of him, then slowly understand him, love and relationship seems too far away.
In all the promos mohan is shown as clumsier than kids. Megha will chide him like a kid for his clumsy habits (doesn't tie his shoelaces properly, pulls chewing-gum from the mouth, eats cone icecream with the icecream flowing down) and also bad language.
Still he is not innocent or ignorant. He is just carefree and unconcerned about anything. He wants to keep away from relationship and responsibilities. That was clearly shown in y'day episode where he tries to stop himself from talking to nanhi and then hesitating to take Nanhi's hand of friendship. The way he scared Renu off was also indication that he doesn't like anyone entering his private space.