"That favor you might have from the Summer Maiden might be able to help me but it can also be used to help you. Or Gongenzaka. You said it yourself, you have to be strong enough to protect him. And now that the Ringmaster's changed patrol to a militia, you'll need to protect him more than ever."

They just had this conversation, not even a week ago. In Strange's mind, if Yuya wants to be more powerful and wants to find a way to keep Gongenzaka safe, he should do what he can to focus on that. After all, he can't use that favor to help both of them.

Strange is trying to keep his voice deliberately neutral and trying to keep himself calm. It's only mostly working.