It seems people like to make big assumptions without proof or think about the situations. There was a statement that was suggested that the person thought Hei's power was absorbed into Suou and now she is a Contractor.

That is highly unlikely since Hei's star disappeared. If she had then the BK201 star would still be shining brightly instead of disappearing. It's simple as that.

The person also thought from the start that Suou is a Contractor. If that is so then she wouldn't show any emotions, (unless something "special" happened 2 years ago.) If it happened after Hei was stripped of his power then a new star would have appeared. So far, we have no indication that that had happened.

It's fine to give out theories, but you want to have Substantial proof to back it up. There isn't enough. Here is my example on the matter:

Poor theory: Someone on Animesuki had said Pecha had been killed in the 1st ep. However, we didn't see the squirrel get pulverized with bullets, and there he was with Suou in ep. 2.

A good theory so far: Mao is in Pecha. In ep 1, the cat that looked similar to the 1 Mao had possessed in s1 was standing before Suou's window where Pecha's cage sat at. We know that Mao can only take over animal bodies, and that we believe it was Mao's voice telling Suou there are no enemies around. These evidence backs up that theory strongly.

It just shows how human beings like drama and how irrational we can be.