Biography
Proto Man, known as Blues in Japan, is the first Robot Master created by Dr. Light. Considered the "older brother" to Mega Man and Roll, he first appeared in Mega Man 3 training him to see if he could beat Dr. Wily, aiding Mega Man in his fight against evil. (Source: The Mega Man Knowledge Base Wikia)
Appearances
Blues FAQ
What anime is Blues from?
Blues is a character in Mega Man and appears in 2 titles in total, including Rockman Hoshi ni Negai wo.
What is Blues's Japanese name?
Blues is written ブルース in Japanese.
Where can I watch Blues?
Open the Mega Man page for licensed streaming links and the full episode list.