What does the rainbow rose sent by Linni symbolize?

It symbolizes the meeting of passion and beauty.

In the game "Genshin Impact", the rainbow rose is a flower presented by Ni Lin to travelers, symbolizing a warm and beautiful encounter. In Linny's legendary mission, he used rainbow roses to enchant travelers, and then they met happily. Therefore, the rainbow rose is endowed with the meaning of enthusiasm, encounter, love and beauty in the game.