"Of course I'm worried about them," Strange responds, trying his hardest to keep his tone level. But the fact that 9S thought he wasn't worried about Rita, Lambert, and the rest annoyed Strange more than he liked to admit. It shines through in his expression and the slightly annoyed tone of his voice.

"But I cannot do anything about them just yet. I can do something about this servant," said as he idly pats his pocket. "So I'll help them while coming up with a way to save those captured."

Because of course Strange is going to save those captured. Why wouldn't he?