When I first read the name I envisioned some sort of ship helm, (I play too much 7th sea/ Warhammer 40k) the actual sub was far more interesting then what I initially imagined.
A kind hearted slightly passive orc barbarian spirit that unintentionally gives bad advice, sort of like a rune swords personality but without all the epic powers, very cool, and much more readily useful by a GM for low level characters.
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I like the uniqueness of a personality not being the traditional "Hulk kill! smash! bash!" That one would expect from such a item/barbarian. If paired with a young or inexperienced character (or player) it can provide some life saving advice and help keep an inexperienced player from making obviously stupid/suicidal mistakes. (well most of the time anyway lol)