“GOT7” BamBam, who called “TEICE” JIHYO and “BLACKPINK” Lisa, who are the same age, “Nuna (older sister)”? (Knowing Bros)

BamBam of the group "GOT7" revealed his special relationship with JIHYO of "TEICE" and Lisa of "BLACKPINK" on the variety show "Knowing Bros".
Ta. JTBC's variety show "Knowing Bros", which was broadcast on the 2nd in South Korea, featured rapper DinDin with the same name, BamBam from GOT7, and YouTuber
Nana from ralral and girl group "woo!ah!" appeared. On this day, BamBam said, "I'm the same age as 'TWICE' JIHYO and 'BLACKPINK' Lisa.
But since we were trainees, I've called them 'Nuna' (sisters)," and added, "Back then, I was very short and had to look up at them. That's why I was like an older sister.
I still habitually call her 'Nuna'," she said. After hearing this, the regular members of "Knowing Bros" asked, "Then what is going on with Lee Soo Geun?"
Then Lee Soo Geun joked, "Then Ralral will become Noona."