Ghost Soul Spirit in Chinese / Japanese...

魂魄 is a Chinese, Japanese Kanji, and old Korean Hanja term for ghost, soul, or spirit.

It's used in the context of Buddhism as:
Animus and anima; the spiritual nature or mind, and the animal soul; the two are defined as mind and body or mental and physical, the invisible soul inhabiting the visible body, the former being celestial, the latter terrestrial.

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.”

魂の友 is one of a few ways to write “Soul Mates” in Japanese.

The first Kanji means soul, spirit, ghost, immortal soul, the mind, or conscious mind. From Sanskrit, it's Vijñāna.

The middle character is a Japanese Hiragana connecting or possessive article that links the two ideas together.

The last Kanji means friends or friendship.

霊 means soul or spirit.

Sometimes 霊 can be a departed soul or ghost. 霊 is actually a Japanese variant of the Chinese character 靈 (and would be recognized in Chinese).

I titled this as Rai because 霊 was romanized as Rai and represented a fictional superhero that appeared in books published by Valiant Comics.

In Japanese, this can be the given name Rei or Tama. It can also be the Japanese surname Mitama or Tamazaki.