Nae Tennouji

• Birthday: November 9, 1998
• Age in Steins;Gate: 11
• Age in Robotics;Notes: 20
• Height: 137 cm
• Weight: 31 kg
• Blood Type: A

Nae Tennouji is very small for her age.

She is 137 cm tall and weighs 31 kg.

Her young look matches her quiet personality.

She usually wears cute, modest clothes fitting for a student.

At first, Nae is shy and gets scared easily.

She is frightened by Okabe Rintarou especially in his "Hououin Kyouma" mode, and also by Hashida Itaru’s odd behavior.

Because of this, Okabe calls her “Sister Braun” or “Little Animal.”

But as she spends more time with the lab members, especially the girls, she opens up and shows a bright, friendly side.

She’s strict when cleaning and acts as the "cleaning sergeant," giving tasks to others like Hashida Itaru.

Nae is calm and reliable, able to take care of herself at home, and is good at basic chores like cooking.

Nae is the only daughter of Yuugo Tennouji, who runs the Braun Tube Workshop.

She is a 6th grader at a private elementary school.

Sometimes she visits her dad’s shop and helps out.

Nae’s home life made her independent, and she learned to manage housework well.

As she grew closer to the Future Gadget Lab group, she found a place where she belonged.

Nae is very skilled in cleaning and organizes others when tidying up.

She can cook simple meals and live calmly alone if her father is away.

She adapts quickly and manages tasks responsibly, even for her young age.

• Yuugo Tennouji (Mr. Braun): Her father, who takes care of her and runs the Braun Tube Workshop.
• Future Gadget Lab Members: Becomes friends with them, especially the girls.
• Hashida Itaru (“Daru”): Sometimes helps him clean as her “subordinate.”

Early Steins;Gate: The Quiet Girl

In the beginning, Nae is a quiet, shy girl who is scared by Okabe Rintarou’s strange ways and Hashida Itaru’s odd talk.

She is given funny nicknames like “Little Animal.”

As the story goes on, she grows closer to the lab members and shows her brighter personality.

Cleaning Sergeant

Nae takes her job of cleaning seriously.

She uses her “cleaning sergeant” persona to boss around others, especially Hashida Itaru, making sure the Future Gadget Lab stays tidy.

A Tragic Incident: Alpha World Line

In one version of the story (alpha world line), Nae accidentally pushes Shiina Mayuri onto train tracks, causing Mayuri’s death.

This is a sad and important moment that changes the story.

Nae’s Dark Future: The Avenger

On a different world line, Yuugo Tennouji dies by suicide.

Nae grows up holding a deep grudge.

She becomes a Rounder (a member of an enemy group).

In 2025, she captures Okabe Rintarou, tortures, and kills him.

Then, she uses the time leap machine to travel back to 2010.

There, she kills Kiriyu Moeka as revenge.

This shows Nae’s dark side and how her life took a much harsher path.

Robotics;Notes: Nae Grows Up

By the time of Robotics;Notes (set in 2019), Nae is a young adult.

She works at JAXA’s Untrodden Technology Development Center, where new inventions are made.

She makes an appearance in the main story, showing her growth from a shy girl into a capable adult.

In “Steins;Gate: Linear Bounded Phenogram,” Nae has her own hidden story as the main character.

This shows just how important and interesting she is in the whole Steins;Gate series.

• She is called “Sister Braun” or “Little Animal” by Okabe Rintarou.
• She is often seen helping her father at the Braun Tube Workshop.
• Nae is very serious about cleaning and organizing.
• She is one of the youngest characters in Steins;Gate but shows much responsibility.