Senna Inaba

Senna (茜雫, Senna) is a young Shinigami that was involved in and brought an end to the events of the Memory Rosary Incident. After her supposed death, she went to Soul Society as a plus and eventually was trained as a Shinigami, however, after a shinigami goes missing due to the workings of Hontomaru Ryōdoji, who is seeking revenge using the Blanks, she joins the Kinenbuke in an effort to assist bring down the last of the Dark Ones and finally rid the world of the Blanks. As such, she has Substitute-Shinigami status within Soul Society.

Appearance
Senna is a young girl with purple hair and a red ribbon tied to it. She has large orange eyes and was usually seen in a brown school uniform. However, now that she is a shinigami, Senna wears the standard unseated Shinigami uniform with a large, red ribbon tied around her waist and he zanpakuto attached to that ribbon.

Personality
Senna likes the color red and high places. She's also very curious, constantly darting from place to place. Although she is haunted by brief, randomly-appearing memories of "her" past, Senna generally exhibits a spunky, upbeat, and carefree personality.

As once stated by Ichigo, Senna is additionally strong-willed, stubborn, loyal, and somewhat outspoken. Near the end of the Memory Rosary Incident, when Senna was about to sacrifice herself and Ichigo attempts to stop her, she stated that she'd rather sacrifice herself than see Ichigo die, implying that she may have developed romantic feelings towards Ichigo during the time that they spent together. The same might be said for Ichigo, as when he went to a store to buy Senna's trademark red ribbon, the female clerk questioned if it was a "present for his girlfriend", to which he slightly blushed at that query and quickly dismissed it ("not quite" being his reply in the original Japanese version; he insists that she was his "sister" in the English dub). She also went into a brief state of depression when she assumed that Ichigo was killed during his first battle with the film's main villain, Ganryū, after witnessing Ganryū impale Ichigo with his spear.

In her current life, Senna retains much of this spunkiness, however, she no longer has romantic feelings for Ichigo (it has been over twenty years since the two have seen one another). She is deeply devoted to her new comrades and will do anything to stop the Blanks.

Memory Rosary Incident
In Karakura Town, unidentifiable spirits begin appearing en masses. While attempting to deal with these strange souls, Ichigo Kurosaki and Rukia Kuchiki meet Senna, a mysterious Shinigami who wipes out most of them. Senna refuses to answer any questions, so Ichigo is forced to follow her while Rukia tries to find out what's going on.

Meanwhile, in Soul Society, the real world is suddenly reflected in the sky, so Tōshirō Hitsugaya and Rangiku Matsumoto are sent to investigate. They meet up with Ichigo and discuss the events at the Urahara Shop, where Kisuke Urahara explains that a dimension between Soul Society and the real world, known as the Valley of Screams, has expanded to the point that it is connecting the two worlds.

The souls Ichigo saw earlier are known as "Blanks," souls that were lost in the space between the worlds and have been stripped of their memories. The Valley of Screams is composed of these Blanks, but they alone could not be responsible for the size to which it has grown. He goes on to explain that the lost memories of the Blanks will have formed into a single being known as the "Memory Rosary," and he has Ichigo track this being down.

Within the Valley of Screams, the Dark Ones attach Senna to a device powered by the Blanks. As concurrently explained by both the Dark Ones and Mayuri Kurotsuchi, the Blanks are naturally attracted to memories, which they lack. Senna, being composed of nothing but memories, will attract the Blanks, causing a chain reaction that will collapse the entire dimension. This in turn will cause the real world and Soul Society to collide, potentially annihilating both. The Dark Ones explain that their actions are to get revenge on Soul Society: they were Shinigami over a millennia ago, but were exiled and have since adapted to the Valley of Screams.

Unwilling to give up on Senna, Ichigo finds the portal into the Valley of Screams on the river. As he enters it, Rukia heads to Soul Society to get reinforcements. Since the only available portal into the Valley of Screams exists in the real world, and the process that will destroy both Soul Society and the real world will complete within an hour, General Yamamoto orders that the Kidō Cannon be fired at the dimension to obliterate it first. Yamamoto refuses to order a rescue mission with such a tight time frame.

Within the Valley, Ichigo finds himself overpowered by the sheer number of Blanks the Dark Ones have at their command. He is saved by the timely arrival of Kenpachi Zaraki, with lieutenant Yachiru Kusajishi on his back. Aside from Zaraki, Soifon, Tōshirō Hitsugaya, Izuru Kira, Byakuya Kuchiki, Rangiku Matsumoto, Tetsuzaemon Iba, Shūhei Hisagi, Ikkaku Madarame, and Yumichika Ayasegawa have also arrived to help. The group makes short work of most of the Dark Ones, leaving Ichigo to battle their leader. Though it takes Ichigo longer and takes a larger toll on him, he is victorious as well.

Despite having stopped the collapse of the Valley of Screams, the process is far enough along that the effect persists. Senna, now in control of the Blanks, sacrifices herself to use their power to push the two worlds apart once more since she did not want Ichigo to die, thus saving the inhabitants of both Soul Society and the real world.

Extremely weak, Senna asks Ichigo to take her back to the graveyard so that she can see her name on her gravestone. Though the gravestone does not have her name, Ichigo tells Senna that her name is on it. Content that she once lived in the town and assured of her own separate existence, Senna evaporates. Rukia explains that once the power of the Blanks has faded, their memories of Senna will fade along with them. However, after the credits, Ichigo seems to vaguely remember Senna when the red ribbon he bought her floats down from the sky to him, and a girl resembling Senna is seen running past him.

Synopsis

 * This begins the start of her fanon story and her current life according to Ten Tailed Fox.

Powers & Abilities
Senna has Shinigami powers and a Zanpakutō. Rukia revealed once, that her Zanpakutō was lost 100 years ago in the Dangai. However, it wasn't revealed as to how Senna obtained her Shinigami powers or her Zanpakutō at that time, currently she still possess her previous zanpakuto but has gained her shinigami powers through training in the shinigami academy. Unlike other Shinigami, she is able to create a Gigai from leaves and can separate her spiritual form from her Gigai at will.

Expert Swordsmanship Specialist: Senna is a highly proficient combatant with a sword. Her battle style is shown to be swift and graceful with constant shifting in her body stance, similar to a gymnast. Through this, she has able to keep up a continuous attack that leaves little time for countering.

Enhanced Agility: Even in her Gigai, she is very agile, able to perform several back flips at once. It is implied she is adept in Flash Steps when she falls and seemingly disappears, reappearing behind Ichigo during a tight-rope walking performance at the Karakura Mall.

Zanpakutō
Mirokumaru (弥勒丸, Maitreya circle): In its sealed form, Mirokumaru resembles an ordinary katana. It has a red hilt and a square tsuba.
 * Shikai: Her Zanpakutō is released by the command "Call forth the Twilight" (夕闇に誘え, Yūyami ni izanae; "Bring them to the twilight" in the English). It takes the form of a Khakkhara when released.
 * Shikai Special Ability: Mirokumaru has the power to create and control tornadoes.
 * Bankai: Not Yet Revealed/Achieved

Quotes

 * "When you're up high, all the stuff that looks confusing and messed up... suddenly becomes crystal clear."[1]
 * "Bring them to the Twilight... Mirokumaru!"