Jaguar

He is a commando of the United States of America, he is part of the unit in Denmark for Operation Norse Wind during the manhunt for Othinus and Kamijou Touma. Like his comrades, despite being in a mission, Jaguar can still joke about and talk casually to each other. However, this quirk of theirs doesn't diminish their skill, easily surprising Touma and the weakened Othinus. He is the most verbally combative between him and Lynx, always willing to snark and tease Ingrid Martin (White Lion) when her loose tongue opens up. His speech pattern uses a ton of slang and what's more is that he has a Brooklyn accent, according to Lynx. He has a bullet in his breast pocket as a good luck charm against being captured.

His real name is unknown.

(Source: Toaru Majutsu no Index Wikia)