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Can anyone translate "Fearless" and "Faithful" into Japanese words AND Kanji symbols?

I plan on getting two more tattoos. One saying "Fearless" and the other saying "Faithful", but written in Japanese Kanji symbols. Considering that tattoos are permanent, I want to make sure that the symbols are accurate. Please answer or point me in the right direction.

Faithful
~ 忠実
~ (Chūjitsu / Mame)

Fearless
~ 不敵 / 精悍
~ (Futeki / Seikan)

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