Koharu has green hair, tied up into pigtails and has her bangs parted. Her eyes are also green.
She wears the default school uniform, unless customized.
Koharu is a very playful girl, especially towards her childhood friend, Mei. She is almost always in a positive mood.
She is also a loyal and trust-worthy person and is always ready to protect her friends from any threats.
Mei Mio: Koharu's childhood friend. She has a crush on Mei, but knows that Mei is unaware about it.
Yui Rio: Close friends.
Yuna Hina: Close friends.
Saki Miyu: Close friends. They are often called the "Pigtail Duo" by Mei.
Kokona Haruka: Close friends.