|Japanese Name:||桜井 泉|
|Romanized Name:||Sakurai Izumi|
|English Name:||Izumi Sakurai|
|First Appearance:||"Nichijou Episode 0"|
|Affiliated:|| Makoto Sakurai (brother)|
Hajime Sakurai (father)
|Japanese VA:||Mami Kosuge|
Izumi Sakurai is a young, constantly flustered and easily frightened teacher. She is an English teacher, a career adviser and a school counselor, but she is always frightened to give corrective advice to students.
While at work, she is usually seen wearing a green cardigan, a dark beige skirt and the school staff's traditional wooden sandals and white socks. But when wearing casual clothing, she instead wears a beige pull-over, a blue skirt, and purple shoes. She also ties her hair when going casual.
Izumi is a very nice young woman, but she is usually very shy, flustered, and easily frightened, which makes it rather difficult for her to discipline students. She always thinks that she did something wrong, so she always says sorry a lot and becomes nervous. However, she is noticeably less shy around Makoto, her younger brother.
She is not very good at drawing. For example, during an English test, Yuuko Aioi commented to herself that the thing Izumi had drawn looked like a "monster" that looked like it could be destroyed with a poof.
- Manabu Takasaki has a crush on her, though she is completely oblivious of this.
- She seems to like dorayakis.
- She is 24 years old.
- Her father is a respected writer. Her mother is implied to have passed away early in her life.
- A running gag involves Izumi saying something that then echoes in the listener's ear.
- She might be suffering from a specific form of anxiety called "Social Anxiety". It is typically characterized by an intense fear of what others are thinking about them (specifically fear of embarrassment or humiliation, criticism, or rejection). This explains why she always looks like she's very terrified everywhere she goes or every time she talks to someone.
|Trio Sucharaka||Mio Naganohara · Yuuko Aioi · Mai Minakami|
|Shinonome Laboratory||Hakase (Shinonome) · Nano Shinonome · Sakamoto|
|Faculty||Principal Shinonome · Kousuke Oura · Izumi Sakurai · Manabu Takasaki · Kana Nakamura · Tomioka · Akagi|
|Class 1-O||Yuria Sekiguchi · Makoto Sakurai|
|Class 1-Q||Mio Naganohara · Yuuko Aioi · Mai Minakami · Nano Shinonome · Haruna Annaka · Tanaka · Tsuyoshi Nakanojou · Ogo · Midori Ōmama|
|Class 2-P||Kenzaburou Daiku · Koujirou Sasahara · Misato Tachibana · Weboshii · Fe-chan|
|Others (females)||Yoshino Naganohara · Mihoshi Tachibana · Tamamura · Princess Starla · Yuuko's Mother · Double Cheeseburgirl · Sumika · Tanabo · Kimiko|
|Others (males)||Hajime Sakurai · Mi-chan · Dolph · Nakanojou's Father · King Albert · Fey Kingdom Soldiers|
|Others (animals)||Buddy · Karasu · Oguri Cap . Pyon|