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During her interview, she was asked whether she would go on '1 Night 2 Days' as a "morning angel" to wake up the cast members, including her 'Witch Exemplar' co-star Yoon Si Yoon. She answered, "If Dong Goo oppa (Yoon Si Yoon) calls on me, of course I'll go. We've become really close, so I think I'll be good at waking him up." 

Kim Sae Ron also revealed she's close friends with IOI's Choi Yoo Jung, saying, "I became close with Choi Yoo Jung through our web drama 'To Be Continued'. We were close before 'Produce 101'. I wish Yoo Jung unnie will only walk on flowery paths."