Sigma's profile picture from Digimon Adventure V-Tamer 01. Scan taken from DS_Raws by Vande at Digital Starlight.
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Alias III (エイリアスＩＩＩ (スリー) Eiriasu Surī) is a group of Tamers chosen by Neo Saiba to stop Taichi...
Sigma (シグマ, Shiguma) is a member of the Alias III and is the first member to fight Taichi Yagami...
Jake and Starmon Luke and Otamamon