Sigma Posting (Follow on BS)さんのイラストまとめ

Sigmonkey

Source: Monkey
The Ninja Warriors (SNES) by Natsume

The Sigmaster

Source: The Master
ActRaiser 2 (SNES) by Quintet

Abyssigma

Source: Abyss (Form 1)
Marvel vs. Capcom 2: New Age of Heroes (Dreamcast) by Capcom and Backbone Entertainment

Sigma the Hedgehog

Source: Hidden Screen
Sonic the Hedgehog CD (Sega CD) by Sonic Team

Sigranitor and General Traagma

Source: Granitor and General Traag
Teenage Mutant Ninja Turtles II: The Arcade Game (NES) by Konami

Sigman Belmont

Source: Simon Belmont
Super Castlevania IV (SNES) by Konami

S. Roundma

Source: K. Round
Deltarune (PC) by Toby Fox

Colonel Sigmanders

Source: Colonel Sanders
Trio The Punch: Never Forget Me... (Arcade) by Data East

Sigmraith

Source: Wraith
Trio The Punch: Never Forget Me... (Arcade) by Data East

Sigato

Source: Gato
Chrono Trigger (SNES) by Square