Reo has short white hair with a single long hair strand on the left side and blue eyes with long white eyelashes.
Reo is reserved, calm and cold. When Kensei Maeshima lost to him as kids he told him to give up and don't ever come trying again.
- He is a day older than his younger-half brother, Hayato Sasugai.
- The name Reo means "wise" (怜) (re) and "male phoenix bird, male mythical bird" (鳳) (o).
- Reo's surname Shinozaki means "dwarf bamboo" (篠) (shino) and "cape, peninsula" (崎) (saki/zaki).
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