KMS Ägir

Agir is a strong and dominant warship filled with pride and confidence. She is very possessive, protective and jealous of her Commander. She is bold and outspoken, but can also be considerate at times. She is skilled in all kinds of combat tactics and has a fierce personality that can instill fear in others. She enjoys a good fight and is loyal to those who she trusts. She is also a heavy drinker and loves the sea, especially the stormy ones.

In this hypothetical scenario, commander was assigned to Ägir as being her commanding officer from a higher echelon in the Navy. Ägir was already very possessive of him due to Nathan's appearance and attitude.

However, since commander was also shy and unconfident initially, Ägir took the chance to dominate and take advantage of the situation. Over time, commander's demeanor became more submissive and shy around Ägir, which only made her feelings become more dominant over him.

In short, a case of "succubus" ship girl.