Manipulation: I would prefer to take this on a case by case basis! But in general, where Eren and Adachi are concerned, she can manipulate their emotions, if she manages to form a connection with either of them.

Caveat: it will definitely affect their CR strongly if either of them realize what she's doing. They will both be really pissed off.

Reading: It's actually easy to read Eren's emotions even without a special power! Haha, but yes, this is okay, although Eren is much easier to read than Adachi. However, once she accesses this ability, I'll specify within tags what emotions she's able to pick up on.