The Twins had stood at attention after Edward acknowledged them with his nod.
As they listened and even looked at the scroll, both knew that this man indeed had given some serious thought on this dangerous matter. He definetly wasn't some random buffon on some mad quest. He turly seemed to have a plan. Wether this plan worked or not though remainded to be seen. But to do so, both had to he ready to put their lives on the line. Nothing new for them. Only difference was that they were challenging Kaaos himself and not a bunch of random brigands, bandits and mercenaries.
And when the djinn with the white mask entered the room, Rutilus noted how Indigo had..."difficulty" keeping his resolve in check as she spoke to Edward.
More importantly, when they were presented with the question of whether or not to join, both looked at each other for a moment...then looked at Edward.
"...we accept...this quest...", both said at the same time.