Nina Tachibana is a main character in the yuri series Citrus.

The younger twin sister of Sara Tachibana who's smart and has good grades, but is also stubborn. Nina acts as the older sister, despite being the younger twin, and refers to Sara as "Onee-san". Unlike Sara, she's skeptical, and doesn't believe in fate and superstitions, but believes in making your own chance. She is more mature than Sara, but is also very careless and gets worried easily.