Shiho

Shiho is a girl whom Light Yagami once dated.

Plot
After Light kisses Misa Amane for the first time, Ryuk mentions Shiho and a girl named Emi as girls Light has dated before.

Trivia

 * Misa mentions Shiho in her love diary seen in Death Note 13: How to Read, in a section where she writes about how she defeated other girls Light dated in her pursuit for him. Shiho and Emi are categorized under "other sluts." Misa states that anyone who was never actually shown automatically loses.