Sigma is a recurring character in Battle B-Daman.
|Japanese Voice Actor||Tomo Saeki|
|English Voice Actor||Yuri Lowenthal|
Sigma first appears in a mask and a matching red uniform. Sigma has blonde hair with gray eyes and appears to be either caucasian or Asian. Sigma is a skilled but cocky B-Da Player who claims he has never lost a B-Da Battle. Back at his home he is known as the Tiger of the South Sea.
- The word Sigma is the 18th letter of the Greek alphabet.
- In the anime Ababa is the one who knocks him out, while in the manga Castieo under Ababa's control is the one who knocks him out instead.
Sigma is first seen masked defeating a B-Da Player Green Bug Man. He is next seen as a member of the Elite Eight, the top eight B-Da Players of the IBA Winners Tournament. He is scheduled to face Terry McScotty in his Elite Eight match but is confronted by Ababa who knocks him out and replaces him with Liena Grace Vincent. Sigma returns at Cain McDonnells Celebration and begins to rant at Liena who has stolen his identity. He is calmed down by Cain and decides to forgive Liena and leave the party. He is later seen in the crowd cheering Liena on. Sigma returns with Berkhart to help Yamato and Grey defeat News and Salz with his rebuilt Scope General.
B-Daman: Scope General
Scope General is Sigma's true B-Daman. But after Sigma was knocked unconscious by Ababa, Scope General is stolen by Liena. Scope General is dropped into the infested waters of the special stage set for Sigma (Liena) and Terry's battle by Liena to debut her own B-Daman "Garnet Wind".
Sigma makes his appearance in the manga where he is on his way to battle Terry McScotty.
|Green Bug Man||Win||B-Daman Invasion|
|News and Salz (tag w/ (tag w/ Yamato, Grey, Wen, Li, and Berkhart)||Win||Direct Hit Battle|