Gaen Izuko is a brilliant expert who leads an organization called the Gaen Network, making her a key figure among specialists. Others who aren't part of her group have trouble working because of her strong influence. Though she is over 30 years old, her appearance is surprisingly youthful—she looks more like a teenager and cleverly wears oversized XL clothes. Gaen Izuko is knowledgeable, confident, and sometimes overbearing, which can make younger colleagues avoid her. She is related to several main characters, being the younger sister of Tooe and the aunt of Suruga Kanbaru, but due to family issues, she stayed distant from Suruga until a certain episode where she meets her again, hiding her identity as an aunt. Aside from her impressive knowledge, Gaen Izuko is skilled with technology and uses many phones and smart devices. She has influenced official policies and owns replicas of famous mystical swords. Her activities reach into both private and public worlds, showing her broad power as a specialist.
Gaen Izuko is over 30 years old, but she looks like a girl in her teens.
She has a petite body, yet she wears XL-sized clothes skillfully and stylishly.
Her look is fresh and unusual, which makes her stand out in a crowd.
Gaen Izuko is famous for her high intelligence and keen insight.
She often says, "I know everything," showing great confidence in her abilities.
She likes to explain her actions in detail.
Her attitude is self-centered and overly friendly, so many juniors in her field tend to avoid her.
Gaen Izuko is the leader of the Gaen Network, a group for specialists with secret knowledge.
Specialists outside her network find it difficult to work because of her strong control over the field.
She is the younger sister of Tooe and the aunt of Suruga Kanbaru.
Due to family problems, she had little contact with Suruga for years.
Gaen Izuko has expert knowledge and is a master at gathering and analyzing information.
She is good with technology, unlike Meme Oshino, and handles several phones and smart devices.
She owned replica versions of two mystical swords—Kokorowatari (Heart Span) and Yumewatari (Dream Span)—which she later returned to Shinobu.
Gaen Izuko is Tooe's younger sister.
She is Suruga Kanbaru's aunt.
For a while, she stayed away from Suruga, but later, with Koyomi Araragi's help, she met Suruga again while using the name "Izuko Oshino" and hid the fact that she was Suruga's aunt.
Gaen Izuko's way of making secret activities public helped create an official government group called the Rumors Section.
Her influence on the world of specialists is huge.
Suruga Kanbaru Reunion
Because of family issues, Gaen Izuko stayed distant from her niece Suruga Kanbaru.
However, in the episode called "Shinobu Mail," Gaen Izuko meets Suruga again with Koyomi Araragi acting as a go-between.
She introduces herself to Suruga as "Izuko Oshino," pretending to be the sister of Meme Oshino and hiding her real identity as Suruga's aunt.
Swords and Technology
Gaen Izuko owned replicas of the legendary swords Heart Span and Dream Span and gave them to Shinobu later.
She is skilled in using electronic devices, setting her apart from other specialists like Meme Oshino.
Helping Specialists
Gaen Izuko created the Gaen Network to guide and control other experts.
Her efforts to make behind-the-scenes operations official led to the creation of the Rumors Section.
"I know everything."
Gaen Izuko uses this phrase often to show her confidence and deep knowledge.
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