Nayoung has various nicknames, one of them being "Stone Nayoung". The reason for the nickname is because during the production of Produce 101, she was always be portrayed having the same expression over and over again.
The lyrics for the group's debut album's, Chrysalis, intro "I.O.I" were penned by Nayoung and Yoojung. Additionally, both members also co-wrote the rap lyrics for the album's title track, "Dream Girls"
She has trained for 4 years and 3 months, if including Produce 101, then she has trained for 4 years and 7 months. Coincidentally, this is the same amount of time with her fellow rapper in I.O.I, Yoojung