4℃

4℃（シド、Shido?）is a minor antagonist who first appeared in the Steins;Gate visual novel as the cheating opponent and sore loser to Faris in the Rai-Net Access Battlers Championship.

Nickname
Though 4℃ prides himself on being called 4℃, pronounced "Shido", Okabe prefers to belittle him by calling him "Yondo". "Yon" being an alternate reading for the number 4 in Japanese.