Just A thought Guys , Nikki's Acting Aggressive and all based on the previous . . etc. . .

just a thought is it nikki or jessica ?

Yeah I had that thought. When she told Mohinder that she's his new partner, she seemed like Jessica not Niki...

I don't think Niki's in control of her body. She's Jessica right now, I'm sure of it.

i think jessica too. nikki isnt as confident.

in the previews of this episode im 98% sure it's jessica, shes smart, more confident, walks like she is on the kill

Confirmed: Niki was in control when she talked to Mohinder, however she lose control when under the influence of the Nightmare man.

It's Nikki because Jessica wouldn't care about DL getting shot.

I've believed it to be Niki the entire time, just easily manipulated by the Company.

I hope she'll be cured

yeah i agree also she was totally Niki but she was in control of her super strength.

in the episode where she intros herself to mohinder as his new partner, i thought it was nikki.. then after watching episode 7, she seemed like nikki..

guess i didn't really answer the question properly..

i think its niki
we saw what happened when "jessica" (maybe, i thought for a while she was going to take on another personality but ehh) came through, mohinder had to taser her!
and how she always says she "sick"
i don't think jessica would say that