Worrisome
She had to admit to herself, she was worried about him. She went to talk to him about Omega after he was settled in on the ship. Shepard couldn't believe what he went through in the past two years. Part of her was proud of him yet part of her was worried about him.
It seemed the only thing he was focused on at the moment was finding that turian – Sidonis – who betrayed him and killed his whole squad. Shepard hoped he would be able to find him since she didn't want Garrus distracted for when the Suicide Mission arrived.
For now, she wouldn't tell him she was worried. But eventually, if things didn't change, she would and she'd help him get through this.