Shiho

Shiho is a girl that Light Yagami used to date at some point.

Plot
After Light kissed Misa, Ryuk mentioned Shiho and another girl that Light used to date.

Misa mentions Shiho in her love diary seen in How to Read 13 in a section where she talks about how she defeated other girls Light dated in the pursuit for Light. Shiho, along with another girl named Emi, are categorized under "other sluts". Misa states that anyone who was never shown automatically loses.