I think this kind of applies to Wolfgang Grimmer from the manga Monster, as he was a child tortured by 511 Kinderheim, a torture bootcamp for children to find the next Hitler, where he was rendered someone who struggled to feel deep emotion for any bad event, but he still remained a good person helping whoever he could, similar to the main protagonist Tenma. I think this also applies to Android 16 from Dragon Ball Z, who was programmed to kill, but went against his programming due to his love of nature.