Solji is the main vocal of the girl group. However, EXID had to make a comeback with just 4 members as Solji is continuing her treatment for hyperthyroidism. For EXID's new album 'Eclipse', Hyerin took over Solji's parts and sang the high notes.
At their comeback showcase, LE mentioned Solji's hiatus and said, "I'm proud of Hyerin. Solji is known to be a great singer but Hyerin is just as good. Hyerin was especially more overwhelmed by unnie's absence but I think she showed a good performance. I'm proud."
To this, Hyerin commented, "I was very nervous. Thank you."