|Portrayed by||Mio Takada|
|First appearance||Fight or Flight|
|Occupation||Curator of the Museum of Cultural History|
Atsumi reads ahead in the scrolls when he is caught by Ando. Although enraptured in Hiro's story, he reluctantly returns back to the last place Ando was at. Afterwards, at an abrupt end, he tells Ando that there are no more scrolls.
In Chapter 5, “The Mystery of Kensei”, Curator Tatsuya documents that Takezo Kensei means “Sword Saint” and that no parents would actually name their child this, but that it was likely a name given to him. The curator says that we have little records of Kensei's actual name or if he even existed. Tatsuya also comments that Daniel Linderman kept the largest collection of Kensei artifacts and refused for them to go on tours.