On the December 13 airing of MBC's 'Radio Star', Soyu stated that she and Dasom are the only remaining former SISTAR members under Starship Entertainment. In regards to her solo promotions, Soyu said, "It's hard promoting alone. The things that I didn't or couldn't do were taken care of by other members, and I took care of the things that the other members' didn't do but now I have to confirm everything one by one by myself so I'm lonely." She added, "I came to realize that solo artists are really amazing."
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As for the reason why she remained under Starship Entertainment, Soyu explained, "I was lazy. I'm not a sensitive type but I don't think I can speak out under a different agency. I'm not good at demanding this and that for me. The current agency and I have a great chemistry. They know (what I need and want) even before I tell them." However, Soyu brought laughter as she added, "But I would've left if I received a great offer from a different agency."
