Yua has short brown hair styled into two playful pigtails tied with green ribbons. Her fringe is neatly parted, framing her bright and expressive face. She is most often seen wearing the standard Tōtsuki school uniform, which complements her lively and approachable personality. Her cheerful appearance and energetic demeanor make her easily recognizable among the academy’s students, especially during official events where she takes the spotlight as an MC.

Yua Sasaki’s personality closely mirrors that of Megumi Tadokoro, as she is shy, gentle, and soft-spoken. She tends to be easily flustered and intimidated, especially when faced with strong or assertive personalities. This is evident when Natsume Sendawara becomes irritated by Yua’s repeated questions, causing Yua to tremble nervously in fear. Despite her timid nature, Yua is earnest and dedicated to her role as an MC, always striving to perform her duties to the best of her ability, even under pressure.

• The name Yua means “reason, case, cause” (由) (yu) and “love, affection” (愛) (a). 
• Yua’s surname Sasaki means “help, aid” (佐) (sa) and “tree, wood” (木) (ki).