Righteous
Righteous , adjective
[Old English rightways, rightwise, Anglo-Saxon rightwīs; riht right + wīs wise, having wisdom, prudent. See Right, a., Wise, a.]
Doing, or according with, that which is right; yielding to all their due; just; equitable; especially, free from wrong, guilt, or sin; holy; as, a righteous man or act; a righteous retribution.
Fearless in his righteous cause.