According to their strategy, Crimson would fight alone at first. Green would gather information from afar and support Crimson with her future forecasts. The reason they chose to fight that way was because they wanted to avoid the forecast loops.
If Green forecast her own future, the very fact that she did would distort the future. One normally couldn't perfectly copy movements one had seen. This was like speaking into a mic, broadcasting it through speakers and picking it up in the mic again. The margin of error of Green's forecasts would grow larger, and the forecast would eventually fail. In her last battle, Kiriha had seen through that weakness and defeated her. In the end, not including your own actions in the forecast would create a more accurate result. Since they didn't want to make the same mistake again, they had decided on this way of fighting.
“Even then I'm reluctant to sending you out on your own, Crimson”
”Oh? That's not something someone from Darkness Rainbow would say”
”Don't make fun of me! I just want to make this plan a success!”
Listening to Green's words, Crimson felt a strange sense of disappointment. Those feelings made her realize something.
I was expecting Green to act as Maki's replacement
Having realized that, Crimson wanted to confirm something. That's why she stopped in place and turned towards Green.
“Green”
”Yes?”
“...If I wanted to―”
―fight with you, would you be my opponent?
Crimson wanted to ask Green that, but she decided to stop mid-sentence. That question was far too different from Darkness Rainbow's way of thinking.
Thinking about it calmly, wanting to fight against powerful enemies, meant that others had to accept Crimson's methods like Maki had. Even among people who fought as their occupation, only few of them saw fighting as everything like Crimson. In truth, Crimson was the only one in Darkness Rainbow that felt that way, and unable to wait for rivals to appear, she had Maki accept her method.
Having others accept her method wasn't very Darkness Rainbow-like. It was only possible with Maki because she had left Darkness Rainbow. It was sheer folly to ask that of one of the leaders of Darkness Rainbow that had turned her back on Maki.
“―Never mind. That's right, Green. Why did you join Darkness Rainbow?”
Instead, Crimson asked Green why she had joined Darkness Rainbow in the first place, unaware that question was yet another one not very Darkness Rainbow-like.
“Mine?”
That's why Green's eyes opened wide.
“Yes. If it's not too much, could you tell me?”
However, Green was just surprised, she wasn't rejecting it. Urged by Crimson, she explained her own circumstances.
“A long time ago... my expectation was wrong, and I lost something very precious. That's why I wanted a certain future rather than a possible one. If I know something will happen before it happens, I won't have to lose anything”
”That's not bad. I've revised my opinion of you, Green. Let's at least grab the freedom to observe the future from Rainbow Heart”
”Crimson... yes, let's do that”
There was actually something Crimson hadn't noticed. That was that unlike Maki, Green would lie. That's why she didn't understand Green's true feelings.
Green wasn't worrying for Crimson just because she was worried about the success of the mission. The truth was that she was sad that Maki had become an enemy. She didn't want Crimson to know that, so she wasn't honest with her. If anything, if she could do that, there might have been a different path for her in her life. The darkness she had fallen into was too deep.