Marina Koizumi (小泉（こいずみ）まりな) is a teacher of Sakura-en Public Elementary School. She debuts in Episode 7 of Miyakawa-ke no Kufuku and is voiced by Natsumi Yamada.
Appearence and Personality
She is a colleague of Mr. Osawa. She has long, orange hair and has a elusive personality. Her catchphrase is "Aaah~" (あぁ〜〜〜〜).
|Konata Izumi - Tsukasa Hiiragi - Miyuki Takara - Kagami Hiiragi - Ayano Minegishi - Misao Kusakabe - Yutaka Kobayakawa - Minami Iwasaki - Hiyori Tamura - Patricia Martin - List of Characters|
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|Minoru Shiraishi - Meito Anizawa - Daisuke Ono - Gotouza|
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|Kō Yasaka - Yamato Nagamori - Izumi Wakase - Fuyuki Amahara - Tamaki Yamanobe - Miku Busujima|