A Youtuber mentions Jang Nara as one of the polite idols he has met while working in an airport.

At 57secs, he mentioned that whenever Jang Nara is at the immigration counter, she would be very polite, and doesn't have the attitude where she needs to be treated as a top star.

Note: He actually listed her as an SM idol singer, no idea why, but it seems like a lot of Chinese/Taiwanese still thought that she was under SM.

Also he put her as a KPOP idol rather as an actress. He actually has a separate video for actresses. I think it's because back then when he actually met her, she was promoting as a singer.