Kay has a bright and optimistic personality, using her positive outlook to lead and unite the team. She believes that fair play is paramount in Sensha-do and that no underhanded tricks should be tolerated. After the battle with Ooarai Girls' Academy, she apologized to Miho Nishizumi for the interception of their communications.

A girl with very short hair and a sharp, piercing gaze. While she often gives a boyish impression, she is actually quite well-endowed, though not to the same extent as Kay. As the No. 2 of the powerhouse Saunders University High School—Ooarai's first-round opponent—she first appeared when she spotted Yukari Akiyama attempting an infiltration, noting, "I don't recognize that face." In matches, she commands a Firefly, which boasts the highest firepower in the team, and accompanies the main force led by Captain Kay. She didn't have a major role until the middle of the match, but her captain's deep trust in her was evident when Kay specifically called her out, saying "It's your turn," while selecting four tanks (including her own) to rescue the flag tank, an M4A1 commanded by Alisa, which had been cornered after Ooarai turned their radio interception strategy against them.

The vice-commander of the Saunders University High School Sensha-do team. She is the team's number three and strategist, following Kay and Naomi. She has reddish-brown hair tied in short twin-tails, is short in stature, and is often seen wearing a blue backpack. Before the match against Ooarai, she visited the Ooarai team with Naomi and guided them to their own food trailers. Seemingly unable to keep up with Kay's cheerful and boisterous energy, she was seen looking on with exasperated, half-closed eyes as Kay laughed uproariously at Anzu Kadotani's puns. Rumor has it she has an unrequited crush on a boy named "Takashi"...