[It's definitely strange to consider the thought of them facing no villains; whatever is behind this, it would logical for it to be sentient to some extent in order to pull off the sort of psychological manipulation its accomplished thus far. However, they still know so little that he can't be 100% certain of that either.

When All Might mentions the defense force Aizawa snorts again.]

Figures Guren would get to you. [The man has more energy than most despite his seemingly
aloof personality, but Aizawa appreciates his efforts nonetheless.] The defense force is a good start and everyone in Chroma as a whole seems to be both cooperative and proactive. The fact that we're all on the same page here is at least one less thing to worry about.