Chikai is a young teenage girl with light-brown hair that is usually tied up in pigtails with bangs falling down on each side where it frames her face, cherry-red eyes and a petite build.
She is most often depicted in standard Kitauji High School uniform for female first-year students.
Maki seems to be a very dedicated girl to music and the concert band who is often depicted helping Haruka Ogasawara (Maki's fellow saxophonist and band president) with work around the club.
- The name Chikai means "oath, vow, swear, pledge" (誓).
- Chikai's surname Maki means "shepherd, tend cattle" (牧).
- Maki made the auditions, despite only being a first-year.
- Although Maki primarily plays alto saxophone, she has been seen playing baritone saxophone in certain performances, such as in Takarajima and Gakuen Tengoku.
- Like Sapphire Kawashima, Maki is a hidden Tuba-kun otaku. Both have formed a so-called “Tuba-kun Alliance”.
|Kitauji High School Concert Band during Kumiko Oumae's first year|
|Note: Section leaders are shown in bold text
1Rejoined the band
2Left the band
3Also in charge of the Tuba and Double Bass sections
|Kitauji High School Concert Band during Kumiko Oumae's second year|
|Note: Section leaders are shown in bold text|