Shirahoshi Yuuyo

Shirahoshi Yuuyō is a Royal Guard and the former Captain of the Seventh Division. She retired between 80 years ago and current time and was directly succeeded by Inazuma Kazuo.

Appearance
Usually wears a kimono with flower design. Ties up her silver hair in a bun, with a flower in her hair.

Personality
Calm and dignified, Shirahoshi always has a look of peace on her face. She never gets angry, even when she fights seriously -- so that her impassive smile when she is overwhelming her enemies has gained her a reputation among Soul Society as an unstoppable "Goddess".

History
Was the Seventh Division's Captain at least 80 years ago. Retired sometime after the Noble Incident, to be replaced by her then-Lieutenant Inazuma Kazuo. Joined the Royal Guard after retirement.

Central 46 Arc
Was mentioned by Inazuma and Kikou as they fault. Kikou asked about her, and Inazuma replied that she didn't follow the other Royal Guards to quell the conflict, but that she sends her love.

Zanpakutō
Yuugami (Sun God): Takes the appearance of a regular katana.
 * Shikai: Released with the command "Incinerate". Transforms into a halo of energy around Shirahoshi.
 * Shikai Special Ability: The strongest plasma-type Zanpakutō in history so far, Yuugami's abilities mimic those of a star.
 * Bankai: Shinikakete Iru Yuugami (Dying Sun God). In this form Yuugami becomes a literal miniature star, hollow and with Shirahoshi at the center. Yuugami gains three new attacks, unlocking its full potential for its mass destructive abilities.
 * Bankai Special Ability:
 * Taiyou Furea (Solar Flare): Generates both extremely high temperature solar winds and super concentrated radioactivity in order to produce a highly damaging and wide ranging attack.
 * Kurenai Honoo (Prominence): Mimics the huge pillars of gas extending tens of thousands of kilometers over the actual sun to directly attack an opponent, drastically increasing the temperature and radioactivity received. Can attack an opponent from miles away, though accuracy is nil, as it destroys everything in its path.
 * Choushinsei (Supernova): Mimicking a star's final stages of evolution, it explodes in both an incredibly powerful and wide ranging blast; referred to as a supernova. Shirahoshi is banned from using that attack in Soul Society or the Human World, as it is powerful enough to destroy Seireitei.

Trivia

 * Like both of her successors, Inazuma Kazuo and Heikishou Kikou, Shirahoshi's Zanpakutō is a weapon of mass destruction. As such she and her successors have been nicknamed the three GMDs (Gods of Mass Destruction).