: Before the apocalypse, the two lived together in Rika's high-security apartment.
Living with the DEAD Chapter 1, a highschool of the dead fanfic : Before the apocalypse, the two lived together
: Their relationship is often implied to be deeper than simple friendship. Shizuka shows significant emotional dependence on Rika, and Rika is protective and affectionate toward her. : Before the apocalypse
: While there is no formal romantic relationship between them, Shizuka occasionally flirts with Takashi , particularly when she is drunk. She also frequently misinterprets situations or comments in a sexual way, leading to comedic tension. Shizuka occasionally flirts with Takashi