Aina Rumika

Aina Rumika (愛菜 るみか, Aina Rumika; "Rumika Aina") is the homeroom teacher of class 2-B, and subsequently Hibiki and Ayaka's homeroom teacher.

Appearance
She is a woman of average height with long blonde hair and yellowish/brown concentrically-ringed eyes.

Personality
She is one of the few characters who is not initially weirded out by Machio Naruzo flexing and tearing his clothes, being more interested in his advice. Like Kure Yakusha and Tachibana Satomi, she is angered by quips about her age.

Plot
She is the homeroom teacher of Sakura Hibiki. She is first seen, announcing the members of the track team. She and Kure Yakusha go to return Satomi's gym card and join the gym themselves.

Relationships

 * Tachibana Satomi: Rumika is good friends with Satomi. Both share an interest in cosplay and getting married.
 * Kure Yakusha: Aina has a good relationship with Kure-sensei, with them both being teachers. She respects Kure-sensei's physical abilities.

Etymology

 * Aina means "love, affection" (愛) (ai) and "vegetables, greens" (菜) (na).
 * Rumika is written in hiragana (るみか), which has no special meaning. However, when written in kanji (瑠美香, 瑠美夏, 瑠実香, 瑠実佳, 留未華, 留実香, 婁実果 or 路実香), it could possibly mean:
 * 瑠美香 - "lapis lazuli" (瑠) (ru), "beautiful" (美) (mi) and "fragrance, fragrant" (香) (ka).
 * 瑠美夏 - "lapis lazuli" (瑠) (ru), "beautiful" (美) (mi) and "summer" (夏) (ka).
 * 瑠実香 - "lapis lazuli" (瑠) (ru), "fruit, good result, truth" (実) (mi) and "fragrance, fragrant" (香) (ka).
 * 瑠実佳 - "lapis lazuli" (瑠) (ru), "fruit, good result, truth" (実) (mi) and "good, beautiful" (佳) (ka).
 * 留未華 - "detain, fasten, halt, stop" (留) (ru), "un-, not yet, hitherto, still, even now, sign of the ram, 1-3PM, eighth sign of Chinese zodiac" (未) (mi) and "flower, petal" (華) (ka).
 * 留実香 - "detain, fasten, halt, stop" (留) (ru), "fruit, good result, truth" (実) (mi) and "fragrance, fragrant" (香) (ka).
 * 婁実果 - "frequently, tie" (婁) (ru), "fruit, good result, truth" (実) (mi) and "fruit, reward, carry out, achieve, complete, end, finish, succeed" (果) (ka).
 * 路実香 - "road" (路) (ru), "fruit, good result, truth" (実) (mi) and "fragrance, fragrant" (香) (ka).

Notes & Trivia

 * She likes to cosplay.
 * By her own account, she was a delinquent in her youth. By her own admission, she also drank underage.