Shun Oigawa

Shun Oigawa (大井川 旬, Ōigawa Shun) is a cognitive psychology student at Tokyo University and part of Professor Maruyama's research group.
==Physical description==
He has short dark hair and dark eyes.
==Personality==
==Biography==
===History===
At some point, Oigawa deleted other people's data from the computers. For this, Kanae Himeno reported him to the university.
===Psychological Research Lab Murder Case===
When Kanae Himeno is showing Chicory Monki, Ron Kamonohashi, and Totomaru Isshiki, who have come to Maruyama's research lab to gather data, around, Oigawa and Renjiro Imai get into an argument about the afternoon reservation for the experiment room; both say that they reserved it first.
The next morning, Himeno is killed in an explosion in the lab when she opens the door to the shield room as it has been filled with flammable gas. Toto and Ron investigate her murder and gather Oigawa, Imai, and Riko Niki in a lecture room to interview them as Takanori Aoe told them that the use of the experiment room is left to them. Toto asks if any of them knew that Himeno would be using the experiment room this morning. Oigawa tells him that all four of them wanted to use the experiment room this morning. To determine who would get the spot, they used the lottery feature of a messaging app.
Then, Totomaru wants to know what they were doing until this morning, and Oigawa replies that he went to sleep as it was late. He woke up at nine a.m. as always and headed to Tokyo University afterward. He also says that he did not see anyone and asks if his lack of alibi makes him a suspect. Imai interjects that Oigawa is suspicious as he disliked Himeno for reporting him to the university once. Oigawa replies that Imai used to stalk Himeno after she dumped him.
He, Imai, and Niki yell at and accuse one another. Toto tells them to calm down, and when Ron asks why Niki was scolded by Himeno for cancelling a MRI experiment, Oigawa answers that the MRI has a high maintenance cost. The operation ratio needs to be kept high; thus, they are not allowed to outright cancel experiments.
Oigawa is later present when Toto and Ron gather him, Niki, Imai, and Aoe to reveal the culprit and tell them what actually happened. He is shocked to learn that Aoe killed Himeno and nearly dies when Aoe attempts to blow them up with a bomb. Fortunately, Ron can tackle him down beforehand.
==Etymology==
* The name "Shun" means "season, ten-day period" (旬).
* His surname "Oigawa" means "big, great" (大, o), "well, mine shaft, pit" (井, i) and "river, stream" (川, kawa/gawa).
==References==
Category:Characters
Category:Male characters
Category:Psychological Research Lab Murder Case characters
Category:Civilians
Category:Tokyo University
Category:Tokyo residents