(推し) – your favorite member. Fans compete in "Oshi battles" during concerts (penlight colors, cheering calls).

Not just singers; they are "imperfect beings to grow with." Key traits: no overt sexuality, no dating (implied purity), constant interaction with fans.

– hardcore idol fans. They perform synchronized, exaggerated dance calls ( otagei ) with glow sticks. This looks bizarre to outsiders but is a disciplined art form.

Most idol contracts have a "no romantic relationships" clause. If revealed, the idol may be forced to shave their head and apologize publicly (as happened to AKB48’s Minami Minegishi in 2013). Fans feel "betrayed" because idols are sold as virtual girlfriends.