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Yu Ishigami (Younger Brother)
Ishigami's Brother (real name unknown) is a supporting character in the series. He is the older brother of Yu Ishigami.
He looks very similar to his younger brother but has shorter hair and has a shorter fringe that faces the left side.
His personality is unknown.
He is the first son of the president of a small toy company.
- He is next in line to inherit his dad's toy company.