Understandable, and it looks great — but it's a coined compound, not a dictionary word.

What a Japanese person actually thinks
Reads as a coinage — the kind of thing on a sports banner or a manga title. Not wrong, not embarrassing, just visibly constructed rather than inherited.

Meaning

Literally: warrior + soul
Actually: Reads clearly as 'the spirit of a warrior'. Japanese readers will parse it instantly, but it isn't a standard entry the way 武士道 or 大和魂 are.

Scores

Naturalness●●●●●

Comprehensible and well-formed, but you won't find it in a dictionary. Native speakers may hesitate on the reading (bushi-damashii? bushi-gokoro?).

Coolness●●●●●

Visually strong — three dense characters, good balance. The manga-title energy is a plus for some people and a minus for others.

Watch out

lowThe reading is ambiguous. If someone asks how to pronounce it, there isn't one settled answer.

Get this instead

武士道 bushidō
the warrior's code

If you want the established, dictionary-solid version of this idea.
侍魂 samurai-damashii
samurai spirit

Also a coinage, but a much more common one — it turns up in sports commentary, so the reading is settled.

On skin

武士魂

Orientation: vertical

Bold brush. If you're going with the coined-compound energy, lean into it.