見義勇為 means the courage to do what is right in Chinese.

This could also be translated as “Never hesitate to do what is right.”

This comes from Confucian thought:
Your courage should head in an honorable direction. For example, you should take action when the goal is to attain a just result as, without honorable intent, a person’s gutsy fervor can easily lead them astray.

One who flaunts courage but disregards justice is bound to do wrong; someone who possesses courage and morality is destined to become a hero.

Some text above paraphrased from The World of Chinese - The Character of 勇

See Also:  Work Unselfishly for the Common Good | Justice | Bravery

一心 can be translated as “one mind,” “single-minded focus,” or “wholehearted devotion,” from Chinese, Japanese Kanji, and old Korean Hanja.

Colloquially or figuratively, it means: wholeheartedly; heart and soul; of one mind; single-mindedness, wholeheartedness; one's whole heart; with the whole mind or heart; one mind in heart.

I'm not kidding, all of those came right from the dictionary for this one title.

In martial arts usage, this term emphasizes total commitment, where intent, attention, and action are unified without distraction.
In Japanese budō, it often conveys wholehearted dedication to practice or principle, whereas in Chinese usage it tends toward inner mental cultivation.

In Buddhism, this can refer to the bhūtatathatā, or the whole of things; the universe as one mind, or a spiritual unity.

In Japanese, this can be the female given name, Hitomi.