See, it would be nice and probably best-case scenario
personally if Sheryl had actual feelings for Akira and the author somehow made it so that Akira would return those feelings later down the line. Maybe after his situation with Alpha like what
@Siquall suggested.
However, with the general pattern with this story leaning towards selfish goals and being as ruthless as possible in order to reach them, I'd have to go with the latter prediction. Since Sheryl is still young, she might mistake it as a feeling of love (and if that's confirmed in the LN, plz correct what I'm about to say) but what I see is a child being controlled by fear and trying to seduce Akira to keep her safe space, putting herself in sort of Stockholm Syndrome. I'll still leave the possibility that she'll fall for (or already has fallen for) him for real.
Akira on the other hand, with the way he's been studied and manipulated by Alpha so far, I don't think he'll be able to return Sheryl's feelings in the case she is in love with him. He's being raised to be (or always has been) quite the sociopathic guy, and this is just further supported by the fact that Alpha had to check if Akira was being sympathetic towards Sheryl, which he was not. I understand why he would choose his actions and thought processes though since he was raised in the slums while getting used and betrayed left and right, but that's also most likely going to be his downfall once Alpha completes or is close to completing her goal and possibly decides to use the already limited trust from Akira to betray him.
Anyways what I'm trying to say is that Akira will probably stay oblivious to/ignore Sheryl's feeling towards him.
Would love it if I turned out wrong and he somehow changes how he thinks.