Kei doesn’t have to think twice: he will help Olson, even if it means fighting against the Emaan. However, the two friends come to blows once Olson reveals his motivations.
We still don't know that.
Besides, the Emaan can't kill us.
Da wäre ich mir nicht so sicher.
Zudem dürfen die Emaan uns nicht töten.
Aún no lo sabemos.
Y los emarnianos no pueden matarnos.
Aún no lo sabemos.
Y los emarnianos no pueden matarnos.
Pas sûr, et en plus,
les Emaan peuvent pas nous abattre.
Ainda não sabemos. Além disso,
os Emaans não podem nos matar.
Рано об этом судить. 
И, к слову, эманам нельзя нас убивать.