Heart of a Warrior in Chinese / Japanese...

武士心 means “Warrior Heart.”

武士心 is more a Japanese title than Chinese, but it is understood in both languages.

戰士之心 can mean “Heart of a Warrior” or “Heart of a Fighter” in Chinese.

鬼武者 is an unusual title that can be translated two ways, daredevil warrior or demon warrior.

The most common is probably the daredevil warrior. However, the first character means demon, ghost, or soul of the departed. Therefore, it can mean the soul of a warrior or a demon warrior.

This title is Japanese only, and should not be used if your audience is Chinese.

This is “Warrior’s Heart” in Chinese.

勇士精神 can be translated as the warrior's spirit or warrior's soul. The first two characters can be translated as “warrior” or literally “brave soldier/man,” although some will translate this word as “hero.” Therefore, this is also how to say “heroic spirit.”

The second two characters mean vigor, vitality, drive, spirit, mind, heart, mental essence, and psychological component. Basically “your soul.”

We have two versions of this phrase. The only difference is the first two and last two characters are swapped. The version here suggests that you admire or like the idea of the spirit of a warrior. The other version suggests that you are the warrior or hero.

精神勇士 can be translated as the spirit or soul of a warrior. The first two characters can be translated as vigor, vitality, drive, spirit, mind, heart, mental essence, and psychological component. Basically, “your soul.”

The second two characters mean “warrior” or literally “brave soldier/man,” although some will translate this word as “hero.” Therefore, this is also how to say “soul of a hero.”

Note: This title is best for Chinese and old Korean. It does make sense in Japanese but is not a common or natural Kanji combination in Japanese.

We have two versions of this phrase. The only difference is the first two and last two characters are swapped. The version here suggests that you are the warrior or hero. The other version suggests that you admire or like the idea of the spirit of a warrior.

戦士魂 is “warrior soul” or “warrior spirit” in Japanese.

Here's the breakdown of the Kanji:

戦士 (senshi) warrior; soldier; combatant; fighter.

魂 (damashii/tamashii) soul; spirit; can sometimes mean “ghost.”

武者之心 means “Warrior Within” from the Chinese video game title, “Prince of Persia: Warrior Within.”

This more literally means “warrior or the heart” or “warrior of the soul/mind.”

中の戦士 means “The Warrior Within” in Japanese.