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Tobiume is a spirit from Bleach
Tobiume is the manifested spirit of Momo Hinamori's Zanpaktou, She shares a lot of similarities with Momo including appearance, but her personality is a complete contrast. She seems to constantly be fighting with Haineko the manifested spirit belonging to Matsumoto.
She is first seen leaving Hinamori's sword and joining Muramasa, shortly after she appears in the streets of sereitai, she apologises before destoying a few shinigami with her fire blasts which shoot out of her bells.
She is seen later and various times inside a cave with the other spirits. When Muramasa does not return she and Haineko leave to try find him and Hyourinmaru.
After arguing constantly with Haineko while searching around they both bump into Kurosaki Ichigo. she grabs him around the neck with her ribbon and pulls him over, before arguing with Haineko again, as Ichigo leaves while they argue they both attack him with their attacks, soon after Hinamori and Matsumoto arrive.
Tobiume starts to insult Hinamori and mocks her because of Aizen leaving saying "you believe waiting around your hero will return" before laughing, soon after she is suddenly attacked by an enraged Momo, Tobiume is utterly surprised at this.
Tobiume charges at momo but runs into a kido Hinamori uses which sends her flying into Haineko which causes another argument
Tobiume's personality doesnt seem to match what it normally should be, it has been heared many times that she was caring and was very close to hinamori, and looked after her. The cause of this might be because of the so called awakening of instinct, and its possible that as soon as hinamori bests Tobiume, her personality will return to normal like Zangetsu and Zabimaru.