|Japanese name:||古塚 梢|
|School:||Kentani High School|
|Grade:||Third-year high school|
|Debut:||Saki Achiga-hen, Chapter 5|
|Voiced by:||Natsumi Takamori|
Kozue has short dark hair and dark eyes. She wears the standard Kentani uniform.
National Tournament Arc
In her match during the second round of the national tournament, she suffered from a bad start after dealing into Ako Atarashi's first hand. After the East round of the first hanchan, she was succesful at holding her ground, overtaking Koshigaya Girls' High School to get her school to third place. This still left her significantly behind the second place Achiga Girls' Academy.