[When the "Justice" part of the trial began, Jean was with Mukuro and Hijikata. They had to stop the dragons from getting to Nicnevin, that much was clear. Jean's first instinct is to attack to kill the dragons, but luckily he's learned a long time ago using your first instinct isn't always the best plan of action.
So he voices his thoughts.]
We can't kill the dragons. We need to find another way to stop them.
[Mukuro was with him on the Dragon killing quest, so he's pretty sure he knows what she thinks, especially since she's military and used to killing anyway... and Hijikata was very angry about the dragon so he could guess that he was on the side "Kill them to stop them" as well.]
3, but it's a wildcard and for three people
So he voices his thoughts.]
We can't kill the dragons. We need to find another way to stop them.
[Mukuro was with him on the Dragon killing quest, so he's pretty sure he knows what she thinks, especially since she's military and used to killing anyway... and Hijikata was very angry about the dragon so he could guess that he was on the side "Kill them to stop them" as well.]