🌌 He and Caladrius are invisible to humans.
🌌 They often pass through walls, but the Collector dislikes the way it feels to walk through people.
🌌 The Collector can change his composition in order to walk on/within water or drift through the air like a breeze.
🌌 He and Caladrius can breathe, but they choose not to. It’s far too earthly a gesture.