The newer season of Bleach chooses very interesting kanjis for the ending poems ( youtu.be )
For example in this episode’s poem:
天(そら)に響めく(どよめく) まやかしの
捉う心(とらうこころ)にはしる旋律(せんりつ)
For me it’s interesting that the kanji used for そら (sky/heaven) is not the usual 空 but 天 which is never read そら, usually read てん, but it conveys the meaning of heaven more than 空.
I’ve seen Bleach doing it several times in the poems