Hamett is a mandalorian that grew up in a clan that was tormented, growing in fear that some day, every person that lived around him would just die. Since a young age, he started feeling weird every time he thought about this, the feeling of fear and anger made him sometimes feel the energy of plants or others around him.
That's when his family realized he was a force user.
If Vader, the inquisitors or any other tribe knew this, he would be in grave danger, that's why they locked him in for 2 years.
The force sensitive started feeling guilt, he wanted to protect them, to learn the power they told him he had, but no one there was able to teach him.

And then the worst happened, the tribe was raided, some taken prisoners, many killed, and he was about to be one more, since one soldier found him, but before he could alert the rest, his anger flow and using the force without control, he killed him, allowing him to survive.
This fear lead him to think that justice must be served by hand, and that's why he wanted to make armors, strong armors that could protect anyone wearing them, to stop the feeling of fear of loss ever again
And thus, his journey to master his powers and become the best armorer began

Justice: The character strives for just and deliberate actions in his life and in his interactions with others. He attempts to make the objectively right choice every time, knowing that justice is more likely to guarantee positive outcomes than symphaty or other emotional displays.

Fear: The line between caution and fear is a thin one. Sometimes the character spends concerned about the potencial problem of a situation than acting at all, or to flee from the danger itself.