The Royal Realm – Shirayukihime no Tenjou’s Time

Senna was Shirayukihime’s faithful servant. (White Princess Rebirth)

The Royal Realm – The Present

Senna now leads the Shinnouhi Royal Guard. They are responsible for Shirayukihime Shinnouhi’s protection but remain in the royal realm rather than Soul Society. Senna appears briefly in the present-day royal realm in White Princess Rebirth. Later, Senna appears her taicho capacity in Story Arc: King’s Seal.

In Fifth Division in the Red, Shinjiro states that Senna is in love with Shirahime (Shirayukihime Shinnouhi).

Senna in Bleach Canon

Senna appears as a major character in the first Bleach movie, Memories of Nobody. The story Princess of Memory features a Bleach: Across the Dimensions version of the movie’s events.