INFJ!
Serious minded and caring, values are just so important to the INFJ whose word is their bond.
Although gentle, and preferring to be out of the limelight, the INFJ will work long and hard behind the scenes to maintain harmony but they are also intensely independent, of both of thought and spirit, and will be outspoken in their defence of human values, the downtrodden, and the oppressed. Earnest and responsible INFJs often see themselves on a mission, and they take their missions very seriously. The views of the INFJ are very personal, built up over a long time and so anything which may be perceived as questioning their values may be dealt with in an unusually direct way, surprising those who saw only the quiet INFJ.