Della (stage name) is Death Devil's bassist and a former member of the Sakuragaoka High School's Light Music Club. Like her friends, Della highly cherishes her time within the Light Music Club and later their band Death Devil. She is a highly skilled bassist but does not feel superior to less skilled musicians, seen when she warmly smiled during Yui Hirasawa's apologies for her mistake. As a teenager, she appeared to be unfazed by criticism, seen when she and her friends were scolded by their teacher Horigome. As an adult, she is willing to play at the wedding of her friend Mihoko without concerns, unlike Sawako Yamanaka who is worried that her past might catch up to her.