”These days, juniors don't say hello”... Which idol is Girls' Generation's Hyo Yeon referring to?

Hyo Yeon of the Korean girl group Girls' Generation expressed her displeasure over the recent growing culture among young idols of not greeting their seniors.
Hyo Yeon appeared as a guest on SBS Power FM's "2pm Escape Cult Show" broadcast on the 29th of last month. On this day, Hyo Yeon spoke about greetings and said, "
When we were trainees, there were people who delivered our meals, right? We always had to bend 90 degrees to greet them," he said, "When we opened the door, we had to bend 90 degrees to greet them."
"I greeted them because I see them every day," he said. He added, "When I put the dishes away, I cleaned up all the leftovers and put them away as if I had just washed the dishes."
Hyo Yeon, who is currently working on a YouTube channel where she has a meal with her juniors and holds a talk show, said, "Recently, I treated my juniors to a meal on YouTube.
"I got a lot of positive feedback from the show, and the guests who appeared on the show said, 'He's not like a senior, he's really easy to get along with.'"
However, Hyo Yeon said, "The only thing I regret is the greetings," and added, "To be honest, I myself
When asked, "When you go to a TV station, do all the junior singers come to your dressing room and say hello to you?" Hyo Yeon replied, "They don't say hello to me these days.
There are a lot of singers like that," he said. "I also feel awkward when they come to visit me and say hello, so I tell them not to come, but when we run into each other in the hallway and I'm wondering whether to go or not, I look at them and
I think we should at least say hello. We'll have a chance to meet in the future," he said.