What is Patti's nickname? It seems like all Dream Demons have a nickname in quotation:


"Chaser" John Doe
"Garden" Engi Threepiece
"Pharos" Hercules 


(Not sure about Merry's or Mystletainn's though I suspect Merry's last-name, Nightmare, could be in quotation)

Earlier in the series Engi talks about her sister Patti who was drawn to the human world by "Pharos" Hercules lighthouse and suspected to have been killed by Mystletainn. However, I am wondering what Patti's nickname is? Since they're sisters is it the same or related to Engi's?
According to various sources, she shares the same sobriquet as her sister, 双月花（ガーデン）"Garden." The name reflects the duality of the two sisters.