Nina

Nina (ニーナ) is a a third-year senior student of Midgar Academy and Claire's best friend. She's secretly the personal subordinate of Zeta, but she works outside of the organization Shadow Garden and part of Zeta's faction in resurrecting Diablos.

Appearance
Nina is a human girl with long red hair, tied in a ponytail, with ornaments, blonde eyes, brown skin, with a cat or dog-shaped smile. She usually wears semi-revealing clothing and has a large and mysterious scar on the left side of one of her breasts.

Personality
Nina is a cheerful and easygoing girl who does most things with an upbeat attitude, even displays a smile on her face most of the time. Highly social and excitable, she loves to hang out with her friends, especially Claire. But in fact Nina is noticeably calm and collected, being able to stay levelheaded and focused even during the most stressful situations.

At first glance, Nina may seem like the typical Gyaru type girl while she hides her smart and talented self as a cover to protect Claire. However, Nina possesses a kind side despite her calm demeanor as seen when she had shown to care for Claire upon seeing her painful condition during the process of fusing Diablos' body parts into her body.

Nina is also seeming to have little sense of shame as she shamelessly talks to Claire and Alexia while only wearing in her undergarments, even she doesn't mind being seen with her breasts when her bra fell off later due to Claire.

Powers & Abilities
Nina's overall abilities remain mostly unseen. However, the fact that she became the personal subordinates directly under Zeta, one of the Seven Shadows showed that her skills had been recognized so that she became Claire Kagenō's secret bodyguard. Despite not being Shadow Garden's official member, Victoria herself notes that Nina being able to challenge the Numbers, if she'd actually join Shadow Garden.

Physical Prowess
Nina isn't really good at academics nor ability at the Midgar Academy, but Cid notices that she hides her true prowess and that she's stronger than his sister Claire. She is proficient at regular tasks at the school level and routine work.

Adept Intellectual
During her infiltration at the Academy, Nina apparently faked her grades so that her academic performance is quite poor, but the actuality are not.

Strong Intuition
Although her abilities are unknown, Nina appears to be highly intuitive as she able to escape the Cult's trap prepared by Isaac without a second thought.

Stealth
Nina is also talented in stealth and infiltration due to her ability to blend in anywhere. She is able to sneak into the forbidden library easily to retrieve any book when Cid wants to read it completely undetected, even the Head Librarian who was a member of the Cult of Diablos when he intercepted Alexia Midgar and Claire Kagenō who were intending to take the forbidden book out of the library didn't notice and sense her presence.

Trivia

 * When Zeta revealed her plan to Shadow, and Shadow basically destroying her whole focus with a simple sentence, Nina was utterly confused on why Zeta basically "Gave up" on her grand goal.
 * She also the one who nurses a shattered Zeta back from depression, showing that she generally cares for Zeta as an individual. When Zeta decides to go on a journey around the world like her parents wanted her too, Nina is shown to be extremely supportive and wishing her well.