No, Sadie comes from simply 'sad'. Around the time the band formed, vocalist Mao was in a very depressed state and the band gave a new meaning to his life.
I see , I saw the newest solo announcement live 【AFTER BIRTHDAY EDITION2017 真緒CLASSIC SOLO CONCERT ALIVE ~Sad And Die In Effect~】 , and was thinking about he is doing some sort of tribute os SADIE.