Had some spare time so had a couple of ideas based upon my own character. Hope it helps?? Let me know when you've finished writing
Name: Yamato Jimashimaru (Shinigami)
Gender: Male
Age: 22
Appearance: About 5'11'' in height with short, messy dark brown hair and matching eye colour, though the left eye is silver-blue. There is a vertical scar on either side of the face. On each upper arm, there is a circular tattoo. He wears baggy dark green combat style trousers and a black silk kimono with a silver dragon on the back.
Likes: Cold environments, fast-running water, intelligence
Dislikes: Hot environments, arrogance, ignorance
Sword Name (Shikai): Kuroi no Mizu Tatasu (Black Water Dragon)
Shikai Release: Ryuudou, Kuroi no Mizu Tatsu! (Flow, Black Water Dragon!)
Sword Name (Bankai): Kogane no Koori Tatsu (Silver Ice Dragon!)
Bankai Release: Yuki, Kogane no Koori Tatsu! (Snow, Silver Ice Dragon!)
Sword Appearance: Straight 'ninja' sword in a black saya with black roped handle. In it's sealed form, the sword is engraved with a black dragon running the length of the blade, one on each side of the blade. With the command "Ryuudou, Kuroi no Mizu Tatsu", the blade transforms and grows into a single dragon made up of black water, which can be used as a whip or type of water cannon. With the Bankai release command, "Yuki, Kogane no Koori Tatsu", the black water dragon reverts to its original length, turning silver-blue. The excess water evaporates to form dark clouds. From the clouds, snow starts falling.
Sword Powers: The Shikai release can be used as a whip, which leaves burn marks upon the opponent. The whip can also be used to grab or restrict the opponent, whilst still causing damage. The secondary function of the Shikai release is used as a water cannon, firing high velocity balls of burning black water at the enemy.
When the Bankai is released, though the blade shrinks, it takes on similar properties to that of crystal in terms of density, giving it the ability to cut easily. The excess water evaporates to form dense clouds. These can be used both offensively and defensively. Used defensively, the cloud can be blanketed around the user, and are so dense that movements and attacks are slowed down significantly. Offensively, the clouds start snowing, where the snowflakes reduce the speed and freeze whatever they touch upon impact. This makes it easy for the attacker to get close enough to finish the enemy with the blade.
Preferred Squad: 10th Division or 2nd Division