This article lacks character relationships. You can help out Free! Wiki by re-organising parts of the "Relationships" section, adding more content to it and doing other helpful things to improve the section.
- Main article: Gou Matsuoka
Chigusa is a close friend of Gou, and they occasionally hang out with one another.
- Main article: Makoto Tachibana
At the festival, Makoto complimented her. It seems that they get along well.
- Main article: Miho Amakata
Chigusa went to cheer on the boys with Miho and Gou in the relay.