Is kim Ji Soo and JENNIE a true friendship or a "plastic sister flower"?

Kim Ji Soo and jennie are both members of the blackpink group, and many people in the group think that their relationship is good, because both of them grew up in Korea and are about the same age, so they often play together. I think they must be true friendship. First of all, these two people should have known each other when they were internship in the company before, and they have been debuting together for many years. This feeling is definitely not so easy to replace, because they basically have to face all kinds of criticisms, arguments and even many difficulties faced by the group after their debut. I think this laid the foundation for their friendship, because good friends should actually share joys and sorrows. In addition, if you look at many groups in this group, you will find that two people often interact and even get together to chat. I can see that they have a good relationship. Compared with the other two sisters, they may be older, so they may get along better. Moreover, both of them grew up in Korea, so many cultures and concepts are similar. Compared with the other two sisters, one grew up in Thailand and the other grew up in a foreign country. There must be something closer between them. Moreover, two people are so beautiful together, and there are certainly many opportunities to get along with each other. Moreover, once a new song is released, we should practice dancing together. I think if it is a plastic sister flower, how can there be such a good tacit understanding and the stage can be completed so well, so I think it must be a true friend. And as passers-by, we can't really participate in their lives, and we can't really judge their relationship, so there is no need to judge their friendship directly.