Ruby Steinhardt

ルビー・スタインハート

Other instances

Tekkamen-san
Tekkamen-san鉄仮面さん 
Visual novelsMakes an appearance - Pastel Chime 3 Bind Seeker
Tekkamen-san
Tekkamen-san鉄仮面さん 
Visual novelsSide character - Pastel Chime Continue