Tachibana Izumi (立花いづみ) is the MANKAI Company's Director and daughter of the former director Tachibana Yukio. Izumi is the default name of the game's heroine but her first name can be changed by the player. In the past, Izumi acted on stage herself but decided that she had no talent for it and gave up on acting. Later, due to certain circumstances, she got involved with the MANKAI Company once again in an attempt to save it. She then became the new director and took up her father's legacy.

Izumi is a young woman in her early to mid-twenties with pale skin, bright hazel eyes and long brown hair. She likes to dress casual, yet fashionable and wears a white-blue striped shirt, along with a pair of rolled up dark blue jeans. She also wears a pair of black sneakers and has a small, red purse.

Izumi is a bright and smart young woman who can easily open up to others and is good at evaluating the strengths and weaknesses of those around her. She is quick-witted and fast in taking opportunities once she sees them. Although she is a kind and caring woman, she has her own insecurities and a surprisingly low self-esteem, which she'd rather keep to herself. Throughout the story, it's shown that she often puts others above her own interests and tries to mediate between the many different clashing personalities she has gathered in the MANKAI Company. Izumi also has a quirk; her extreme love for curry. She loves it so much, she would go on long rambles about the spices in it and their origins.

During her childhood, Izumi would often visit the MANKAI Theatre and watch her father work as the director. Over time, she got interested in acting herself and met the young Furuichi Sakyo, who she introduced to the company. Both of them quickly became childhood friends. However, Izumi stopped visiting after she was told she had no talent for acting at all. In the present, six years after her father's disappearance, an invitation letter from the MANKAI Company that was addressed to her father was sent to her. Izumi decided to pay the theatre a visit in hopes of finding out where her father disappeared to, but soon got herself involved in the company's troubles.

(Source: A3! Wikia)