Jaune Arc is the leader of Team JNPR. His weapon of choice is Crocea Mors, which is a sword and a sheath that can expand into a shield. The weapon was handed down in his family from his great-great-grandfather, who used it to fight in the Great War. He makes his first appearance towards the end of the first episode, "Ruby Rose"; throwing up in the airship and earning his temporary nickname, "Vomit Boy", from Ruby Rose.