Kasuga Sarutobi

Kasuga Sarutobi (猿飛 春日, Sarutobi Kasuga) is the daughter of Hiruzen Sarutobi, the Third Hokage, and the sister of Asuma Sarutobi. A master of all five basic changes of nature and an accomplished Sage Master, she was personally trained by the Sixth Hokage, Seireitou Hyūga, and became his eventual successor as the Seventh Hokage (七代目火影, Shichidaime Hokage; Literally meaning "Seventh Fire Shadow").

Personality
In her younger years, Kasuga was a rather quiet girl that often ignored the strife that surrounded her daily. Perhaps it was the constant fear revolving around the consistent threat of death that plagued her which contributed to her cold indifferent persona, due to having lived in the era were the Third Shinobi World War was still raging on, though whatever the case, she had not cared if she lived or died. It was only after meeting Tsunade, one of the three great Sannin, that she began to see light in the world for the first time in her life. She saw this beautiful woman with strength in her eyes and pride in her voice, despite the horrible state of the world and how it impacted normal people, becoming inspired to follow in her footsteps and one day become just like her. Though she lived in a rather secluded mindset, letting nobody but Tsunade into her heart, she did want to earn her praise by becoming a respected kunoichi. This goal eventually matured into a sort of pride for her status as a kunoichi, which carried itself into her adult years, and subsequently led to her desire to succeed Tsunade in the following years as Hokage.

Over the years, fueled solely with the desire of acquiring Tsunade's praise and becoming one of the greatest kunoichi, Kasuga matured into a stern and rigid woman whose eyes exhibit nothing but a coldness that blocks anybody from perceiving her thoughts. Though the influence of Tsunade in the girl's youth did prevent her from becoming emotionless, Kasuga still retained a rather callous personality. She had no sympathy for others and even goes as far as to find some sick sense of joy out of watching others suffering. However, there appears to be some sort of irony here in that she only finds enjoyment with such things when she is the one that causes it; going to the defense of those being tortured by others and slaying the enemy responsible. There is no way of knowing what is the reasoning behind this inconsistency, though it could be that she simply isn't capable of empathy because of her childhood but tries her best to understand. Kasuga often disregarded her own existence as a female and opted for more masculine characteristics, quite possibly born from a necessity to survive in the world where women were seen as mere tools by men, despite deep down wanting to live as a true woman and become one as beautiful as she regarded her mentor to be.

While in combat, this coldness carries over into her lack of mercy while in the troughs of fighting. Her sadistic tendencies support her fighting style with hand-to-hand combat, aiming to strike opponents in locations that would cause the most pain and grant them the most horrible of deaths; including, but not limited to, snapping their neck after forcing them on their knees, standard forms of bloody and rough mutilation, and her most favored method, castration. Combined with her warrior senses and callousness, she will even make comical remarks during the most inappropriate times in regards to violence, which put others at discomfort when they are around her.

Her sexual preferences are shrouded in mystery, although it is shown that she has an almost distinct distaste in all men. This is most commonly shown whenever a man touches her, she possesses the automatic reflex of throwing them over her shoulder whether she meant it or not. It is possible that she derived this from her youth, often watching innocent women brutalized for no reason other than to watch them writhing, but also may be due to the form of lecherous training methods of her mentor, Seireitou. As such, it seems she has a personal distaste for the latter, but still has come to develop a sense of respect for his strength as a warrior and his principles as a person; viewing him as her precious mentor, regardless what evil he may be capable of performing.

Trivia

 * Kasuga's name is derived Kasuga, a character from the Sengoku Basara video game and anime, whom is also employed as a kunoichi. This was done purposely due to the author's personal belief that many members of the Sarutobi perhaps were named after significant shinobi and kunoichi in actual Japanese history.
 * Her personality and traits were borrowed from another character created by the author in the Bleach fanon universe.