|Name||岩本樹 (Iwamoto Tatsuru)|
|Favorite Subject||Modern History|
|Extracurricular||History Study Group|
|Hobbies||Constructing Plastic Models|
A second year student who belongs to the History Society. She is a military geek and speaks in a military-like tone unlike the usual tone used by most of the girls, and is serious & tough. The first person in her mind is herself Although her hobby is completely different from Ariga Maeda, who belongs to the same history study group, they seem to be close.