Tensai Ikkyū
Nanana's Buried Treasure - 01 02.04
壱級 天災
Ikkyū Tensai
Age 16
(B. July 26th (Leo)[1])
Gender Female Female
Status Alive
Light Novel Nanana Volume 1, Tensai Volume 1
Anime Episode 1

Kana Asumi

Tensai Ikkyū (壱級 天災?) is one of the main characters of the series Nanana's Buried Treasure. She is also the lead character of the side story Tensai's Reluctant Deduction.


Tensai has long blond hair cut near her flat chest and golden eyes. She usually seen in her detective attire or school uniform.

Her detective attire consists a white shirt with long sleeve and dark red vest with golden buttons. There is also a dirty white cape about ten centimeters long with dark red lining and dark red small tie, dirty purple-ish blue miniskirt and black thigh-highs, plus brown short boots. She also necessarily wears a dark red hat.


Tensai has an intimidating personality, not to mention that she also has a good eye for mysteries.Tensai (as shown in the anime) , is more than capable of analyzing maps and places in mere minutes, and finding the target. She seems to love to rivaling Jūgo as well.




Jūgo YamaEdit

Tensai found Jūgo to be an interesting person for accidentally finding the Shining Lie Detector, and started investigating him. She is equipped with a phone hacking application which allows her to monitor Jūgo's phone's activities, and considers him as a rival because he is the heir to the Phantom Thief Gang «Matsuri».

Possessed TreasureEdit

Character Art DesignsEdit


Nanae Island Third High School Adventure Club Members
Nanana's Buried Treasure - 01 01.56 Nanana's Buried Treasure - 01 01.58 Nanana's Buried Treasure - 01 01.13 Nanana's Buried Treasure - 01 02.04 Nanana's Buried Treasure - 01 01.25
Isshin Yuiga Yū Ibara Jūgo Yama Tensai Ikkyū Dark Hoshino

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