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|Status||Alive (Go-Home Route)|
Deceased (Ostinato Route)
|Relatives||Unnamed mother (deceased)|
Unnamed father (deceased)
Yuto Yamazaki (cousin)
|Appears in||The Caligula Effect|
|“||You can relax now that you joined the Go-Home Club! Ol' Kotaro Tomoe will keep you safe!||”|
|— Kotaro Tomoe|
Kotaro Tomoe is a member of the Go-Home Club.
Kotaro's father was once a rescue worker, and Kotaro, idolizing him, wanted to become one himself. However, he had self-esteem issues stemming from a small and weak body. Later on, both his parents died, leaving Kotaro to live with an abusive uncle and a cousin who bullied him constantly. One day, he heard one of μ's songs and felt like he was being cheered on, a feeling that soon led him to Mobius, where he could have the large and tough body he never had in reality.