Quatre holds the door open after him; it's polite, but mostly it's a habit. After scanning the hallway (another habit; he doesn't expect an invasion here, and all he has is the gun at the small of his back, but it's not a habit that's safe to shake) he follows Trowa down the hall to the kitchen.

It's a smaller one, used by members of the Peacemillion's crew. The larger one is more central, and less accessible for making tea.