|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)
Manabu Takasaki (co-worker)
Principal (head master)
|Japanese VA:||Mami Kosuge|
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 polite 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.
- She doesn't like spicy food, as seen in a conversation with Takasaki. When asked about how hot she likes her curry, she replies "Zero spicy".
Makoto Sakurai is her younger brother. not like the other, Izumi act firmly to Makoto. she always goes to his room without knocking. that's make him mad.
Manabu Takasaki has crush to her. Izumi always cheers to him.