Koyuki Chigiri

Koyuki is affectionate, supportive and comfortable teasing her younger brother. Their relationship has the familiarity expected of siblings who grew up closely together, rather than being defined entirely by Hyoma's football career.

She takes an active interest in Hyoma's appearance as well as his football. Koyuki used to help with his long hair when they lived together, providing a small domestic detail behind one of his most recognizable visual characteristics.

Her support becomes particularly visible when Hyoma plays in front of a national audience. Koyuki reacts enthusiastically from the stands and clearly wants him to succeed.

Koyuki is not established as a football player and has no canonical footballing abilities or special techniques.

Her appearances focus on Hyoma's family life. She contributes to the personal context surrounding him rather than participating in the competitive systems that structure Blue Lock.

Koyuki first appears prominently with Neneko during the Blue Lock Eleven versus Japan U-20 match. Their presence in the audience connects Hyoma's national-stage performance with the family members who knew him before Blue Lock.

She later provides additional glimpses of Hyoma's life during periods away from the project. Because she lives in Tokyo, Hyoma can visit her when he has time outside Blue Lock.

Koyuki remains a minor family character, but her appearances reinforce that Hyoma's footballing identity exists alongside an affectionate home life rather than replacing it.

Hyoma Chigiri is Koyuki's younger brother. She is four years older, supports his football career and previously helped him care for his long hair.

Neneko Chigiri is Koyuki's mother. The two attend the Blue Lock Eleven versus Japan U-20 match together to support Hyoma Chigiri.