Saeko

Saeko has straight and shiny thigh-length purple hair that has a triangular fringe at the front which barely touches the ridge of her nose, blue eyes, she is quite tall for a Japanese girl and her relatively long limbs contribute leverage to her powerful sword swings. In the manga, one of Saeko's physical features which are often is her lips, which have a shiny pink appearance.

Over the course of the series, Saeko mostly wears her school uniform; however, she has changed her attire more than once in the series.

At Rika Minami (Shizuka Marikawa's friend) house, Saeko wears nothing but an apron with a black thong and she also puts her hair up into a single ponytail.

After leaving Rika's house, her clothing changes to female battle boots with heels, long lace purple stockings, purple gloves, her school uniform top, a skirt that shows the string of her thong and her entire right thigh, a purple lacy bra, and a special belt to hold her sword.

Later at Saya Takagi's house, Saeko wears a kimono.

After reaching the East Police Station, Saeko adds a gun holster with a loaded M9 Vertec strapped to her right leg.

Throughout the series, Saeko is shown to be a very kind, caring, strong and reliable person that is pointed out by other characters, but she is also calm and collected as she almost never freaks out or loses her cool in combat, which is an almost frightening degree. As the second oldest of the group after Shizuka Marikawa, Saeko acts as something of a big sister to the group, often considering the feelings of other members of the group and ensuring their well being.

Saeko, following her familial samurai lineage, strictly follows what can be interpreted as Bushido code; her character, behavioral patterns, and frequent sayings (e.g "it's a man's decision after all") provides evidence of her strict following of Bushido code. She is the opposite of Rei Miyamoto in many ways; while Rei gets very jealous whenever Takashi Komuro gets close to another girl, Saeko is more mature and she doesn't have a problem with it that she even tells Takashi that girls can be weak sometimes.

However, later on, Saeko reveals sadistic tendencies while fighting "them", often smiling whenever she's in combat. It can be assumed that Saeko's existential conflict manifests itself by cloaking her troubled. sadistic, malevolent, and violent nature with the facade of a well-mannered and cultured young woman. Her sadistic tendencies manifested four years before the story when she fought off a would-be molester. At first, it was self-defense, but soon she realized that she enjoyed causing pain and having control over somebody's life. Ever since then, Saeko has grown to see herself as someone unworthy of love and even becomes something of a "death seeker" until Takashi snaps her out of it. After this, Saeko learns to embrace her violent nature, having realized that it's essential for the group's survival.

Despite her sadistic tendencies, Saeko does still have morals as shown when she couldn't bring herself to kill a pair of zombie children, something Takashi was able to do without any hesitation. Additionally, even after accepting who she is, she still shows a certain degree of self-hatred; when Rei states that she hopes she never gets used to killing "them", Saeko states that she's at least better off than her.

Saeko is also shown to have little modesty when it comes to showing off her body, as she had no problem with wearing only an apron and a thong in front of the rest of the group, and even fell asleep next to Takashi while wearing the outfit.