There was silence in the room where they were gathered. They all knew Roan. If he were so certain it would happen, it would most definitely happen. Was that a reason for leaving earlier? Obviously yes. If they stay, they will be sent to the frontlines, and since this is a lost cause, it wouldn't make any sense to keep the twins' group alive. All the geniuses of the Green Cluster would be hunted down to prevent future revenge issues.
Obviously, they were too strong to die, so that wouldn't happen. However, there was a risk that their fake identities would be discovered due to their strength being revealed once surrounded, so the best course of action was to avoid that.
