Who Is The Late Prince (Memory) (Prince Tametaka)?

Prince Tametaka was a son of Emperor Reizei and a lover of Izumi Shikibu. He was the elder brother of Prince Atsumichi and died young.

Episode 3, "The Izumi Shikibu Diary," begins in the spring after his death. He never appears in person; he exists only in Izumi Shikibu's memories and poems. The tachibana blossoms his brother sends her call him to mind as "someone from the past." Her grief for him is where the diary's bittersweet story begins: falling in love with her dead lover's younger brother.