Kirin appeared more brooding than usual.
She almost looked like she was angry at Eren for something he didn't do. At least not deliberately.
Complaining to Eren about his unavailability to contact her for so long was Kirin's way of venting out her frustrations. The fact that they existed mattered more to her, no matter how valid his reasons were for not being able to contact her.
She trusted Eren to pull through any situation but at the same time, she also couldn't help but worry about his well-being.
Eren knew that Kirin could guess the problems he had to deal with in Labh Salem. So there was no need to explain, which was bound to make him sound like he was giving excuses. He only needed to convey 'I'm sorry' in some way. That's all he needed to curb Kirin's anger.
