Why hello there!
As many of you have realized, the name of this shrine relates to the painting Kyouya painted while thinking of Tamaki's words. Although it started small and confined in a frame, he was able to branch out and create a beautiful rendition of his own heart and ability: large as can be and as colourful as a rainbow.
I believe that Kyouya is an amazing caracter and often overlooked, even though he is one of the main characters. Hopefully, everything I gather here will benefit another Kyouya fan