When the seven members — Jin and Suga, 28; J-Hope, 27; RM, 26; V and Jimin, 25; and Jungkook, the mystery hallway singer, is 23 — sit down and begin answering questions, however, they look and sound like the veteran pop stars they are. Seated in foldaway chairs on a stage — where the white surfaces bear shoe prints and other marks from a recent livestreamed appearance on The Tonight Show Starring Jimmy Fallon — they speak politely, eloquently and with conviction, emanating the humble charisma that has charmed millions of fans into supporting them with an almost religious fervor.