Chisao Oyama (anime)

Chisao Oyama (大山チサオ) is a character in the MegaMan NT Warrior anime series. He is the younger brother of Dex Ogreon who was attending a special school in Netopia while living with their father before coming to DenTech City towards the end of the first season. Unlike his brother, Chisao is brilliant, and is able to execute a Program Advance with GutsMan.EXE immediately after he operated him for the first time. After his initial appearance Chisao becomes a supporting character, often seen with Maylu Sakurai or Lan Hikari or paired with Rush.

MegaMan NT Warrior
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MegaMan NT Warrior Axess
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Rockman.EXE Stream
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Rockman.EXE: Hikari to Yami no Program
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Rockman.EXE Beast
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Rockman.EXE Beast+
He appears in episode 17.

Trivia

 * While his last name is not explicitly stated in the video games, Chisao’s last name is identified as “Oyama” like his brother in Japanese credits of episodes he appears in.