Tsujikaze Nagi

The Non-Blood Related Older Sister Oppai Spy!
Race: Human
Second Year at Espiona Girls' Academy
Assigned Class: Free
Code Name: Kunoichi

She is the protagonist’s stepsister. After opening a scroll left behind by their stepfather, she is transported to another world together with her younger brother and mother. In the spy nation of Lukwofort, she ends up living as a student at a spy academy alongside her brother, an older-sister figure who gets dragged into the situation.

Like the protagonist, she is a descendant of ninjas, part of a lineage of modern-day shinobi.
Her mother and the protagonist’s father fell in love during conflicts between ninja factions, abandoned their clans, and ended up together. Although she is the same age as the protagonist, she acts as his older sister simply because her birthday comes slightly earlier. They have a good sibling relationship, occasionally arguing but also joking around and getting into mischief together.

Personality-wise, she is cheerful and attention-seeking, but in the modern world before being transported, she suppressed herself and lived quietly so that her ninja heritage wouldn’t be discovered. Because of that, she often argued with her mother, saying she wanted to quit being a ninja. However, in Yggdrasil, where many different races live, she feels great joy in being able to openly be her true self and is fully embracing life in the other world.

Regarding her younger brother, she knows he supported her in various ways to keep their ninja lineage secret in their previous world, and she feels both gratitude and romantic feelings toward him.

She had kept those feelings mostly hidden because they are siblings, but now that they are in another world, she is starting to think it might not matter anymore. On top of that, seeing other girls approach him has made her anxious, and she tries to keep them at bay with the logic of, “My little brother belongs to his big sister!” She also tolerates a certain level of teasing from him, though she makes him run errands in return.

As a spy, she is highly capable and has quickly become a promising student at the academy.
This is only natural, as her physical abilities, combat skills, and stealth techniques were already exceptional from her ninja training. Especially when working together with the protagonist, they are strong enough to overwhelm groups of monsters in this world.

Her hobby is trying different foods, fashion, social media, and searching her own name online. Her specialty is all forms of ninjutsu.

Her relationship with her mother, Shigure, who is also her mentor as a shinobi, is somewhat strained. They argue almost daily, with the daughter wanting to quit being a ninja and the mother taking pride in their lineage. Each time, the protagonist ends up mediating between them. While she does not hate her mother, she wishes her mother would understand her better.

Incidentally, she once got furious when her mother unilaterally assigned her the spy codename “Kunoichi.”

♡Nagi's Size Chart♡
•Boobs: 115 cm ~ “Where are you even looking?”
•Nipples: 5 mm (Height) ~ “Not bragging or anything, but… they’re pretty sensitive.”
•Areola: 3.3 cm (Diameter) ~ “This beauty… well, you don’t really need to see it.”
•Waist: 56 cm ~ “It’s the result of my daily training.”
•Hips: 85 cm ~ “Big? It’s just stable, that’s all.”
•Thighs: 42.5 cm (Thickness) ~ “Thick? Well… I guess they are.”
•Vagina: 3.8 cm (Full Length) ~ “W-when did you measure that!?”