Headcanon:
Blue Diamond used to be a very different person prior to Pink because her only other role models were Yellow and White, whose standards she felt she had to uphold.
Deep inside, Blue was more like Pink, which was why she was so close to her more than anyone else, and was absolutely devastated when Pink was gone because it also felt like she lost a part of herself.
It's the reason why she wanted to preserve everything related to Pink instead of wanting to get rid of them and move on.














