She may appear to be non-serious, happy go lucky, street smart and fun loving girl but in reality, Anika is an enigma. She's hiding many secrets behind that mask of fun and non-seriousness.#1 The surname - I don't think Anika is suffering from a memory loss or something, if she remembers her sister why wouldn't she remember her parents? If she knows her name is Anika then what about her surname? I think Anika belong to a rich family and has a tragic past because of that she is not using her surname.
#2 Fear of darkness - that doesn't looks like a normal nyctophobia to me. I think that something has happened in her past that made her fear darkness. That's a real mystery as well.
#3 Who is Anika? - I mean who is she exactly? Sahil's parents adopted her, yes but who are her real parents? What happened that made Anika stop using her surname? What happened to real parents? Where's her sister? And remember when Anika's nightmare about her sister was shown, there was a voice-over that how her sister died by drowning in the lake near orphanage. How Anika and her sister landed there on the first place?
#4 Sahil's sister/protector - The way she cares about Sahil, is still living with him and all that even after being tortured by that bua and that police woman that really really something.
You see sometimes when the pain become too much to handle people like to divert their minds somewhere else. Some people hurt themselves to get their mind off that pain and some, they just put the mask of ignorance, non seriousness on their faces and live their life.
Anika is just like that, she has so many layers that will unfold in future. She might behave in a comic way but that's her way of diverting her mind off the pain that she has suffered and is suffering. I love Anika as she is, there's no need to change her or make her character a little serious.