leave a big 3 company for another big 3, not as trainees but as already debuted singers.
Both debuted under JYPE (in somi's case she debuted with IOI and other projects but was officially a JYP artist) and then left for YG The Black Label which is like a YG sub-label directly connected to the main company (not like woollim being part of SM thing).
i'm asking for debuted artists, not trainees because that is way more frequent (like gdragon going from sm to yg or cl going from jyp to yg)
are these two queens of solos the only ones to achieve that in kpop history?