: 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.

In the canon series, Shizuka is largely external to the central love triangle involving Takashi Komuro , Rei Miyamoto , and Saeko Busujima . Her "romantic" presence serves two main purposes:

: She acts as a mother figure to Alice Maresato and cares deeply for the students' well-being, prioritizing her role as the "adult" over romantic pursuits. Non-Canon and Fan Interpretations

Living with the DEAD Chapter 1, a highschool of the dead fanfic

Because the original series remained unfinished, many romantic storylines for Shizuka have been explored through fan fiction and non-canon wikis:

: 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.