The members of BLACKPINK have maintained a close relationship with one another over the years. But, outside the group, the four K-Pop idols, also, have other significant ties.

On Saturday, member Rosé shared with the public whom she has a close friendship with, naming Hyeri of Girl's Day. Speaking on the latest episode of JTBC's Knowing Brothers, the two South Korean artists revealed several details about their links with each other, as well as some stories of their adventures.

The "On The Ground" singer stated that going to the fish market and eating fresh seafood is their "favorite hangout activity." Koreaboo reiterated what the two idols said about one of their most memorable moments while eating marinated crabs at the Noryangjin Fisheries Wholesale Market.

Amid indulging in their favorite dishes, Hyeri noticed that some foreigners were taking pictures of them. The BLACKPINK member, also, saw what happened and asked her friend what they should do.

As explained, the two idols are not comfortable with people taking pictures of them without their consent, especially during their personal outings. While Rosé was thinking of ways to approach the group at the other table, she said that Hyeri "got up all of a sudden" and walked right over the foreigners.

She consequently asked them if they took a picture without asking permission. As Rosé was still in shock, she realized how amazing the Girl's Day member was. Following the confrontation, the people from the other table apologized and deleted the images.

Hyeri, later on, pointed out that it has become too "risky to have pictures taken that way" as it can create talks and discussions. She, also, emphasized that she had to take action because her "bestie is a global superstar."

Apart from the pair's experience at the market, the Girl's Day member, also, revealed how generous Rosé is, and how touching her efforts are. AllKpop released a report on the matter, detailing what Hyeri said in the interview.

As it happened, the BLACKPINK member went out of her way to learn Hyeri's private home address to surprise her on her birthday. She said that Rosé always manages to send her gifts even though no one knows where she lives.

She revealed that the "GONE" singer sent her a bouquet of flowers at home while the idol was on tour. This surprised her because Rosé "had never visited" her and her parents' home.

The BLACKPINK vocalist, then, explained that she discovered the address from Hyeri's sister. She recalled remembering the K-Pop idol's sister's Instagram account, and messaged her immediately to learn the details.