Isabel's vocalized answer didn't tell Kuroda as much as the silence leading up to it, the long hesitation as she tried to decide what was worth more, her mission or the lives of the people that had offered to fight alongside her. Even if that wasn't even close to her thought process, either way, he could tell how much he and his friends actually mattered to her, leading to his gaze growing even sharper. "I offered to help you because I thought you just wanted to stop the Arbiters. But if this is all about some vendetta that means more than our lives, I don't see any reason I should let you and my team work together. If that's the case, then you can take your mobile suit and leave."