Mako is also described as being outspoken, generally not afraid to share his opinions with others.
The Legend of Korra - Mako Pop! Vinyl
However, Mako was one of the few who doubted that the Northern Water Tribe was the culprit.
Transcript for —Day of the Colossus.
Bolin realized that doing so could cost Mako his life. According to the creators, the United Republic was founded by Aang and Zuko after the live in harmony.