The nameless space terror, Junko
Who better to make a shrine dedicated to than an actual higher power?
Junko is the main antagonist of Touhou 15, Legacy of Lunatic Kingdom. She's rather unique compared to most touhou characters as she does not have a last name or character title.
Junko is one of the most tragic characters in Touhou Project, having lost her son and presumably her husband years ago. She exists as a pure being of rage and hatred, wanting nothing more than to kill Chang'e, her mortal enemy.
Chang'e was married to the man who killed Junko's family, and despite having nothing to do with their demise, Junko's hatred cannot be satiated.
Junko's ability is to "purify anything." Although it sounds simple, this ability is incredibly powerful. When she purifies something, Junko returns it to its purest form (i.e before it existed as a named concept.) ZUN has stated that this process can give birth to gods.