Senshi title: Some people have a really hard time with this when it’s really quite simple. For example, Sailorvenus is the senshi of love and beauty. My Sailoraquila is simply known as ‘the warrior of air’, but can also be known as ‘the graceful huntress’. You can use their element in their title or even as their title. Pretty much no one covers this topic (that I know of). Other titles for them that I’ve found are: Sailormoon – senshi of love and justice
Sailormercury – senshi of water and wisdom
Sailormars – senshi of fire and soul
Sailorvenus – senshi of love and beauty
Sailorsaturn – Melancholic Fighter
Sailoruranus – Magnifiscent Fighter
Sailorneptune – Graceful Fighter
Sailorpluto – Revolutionary Fighter

Example:

Sailorma'at's title is 'Senshi of Truth and Justice'. Why? Because she's based on the Goddess Ma'at from Egyptian mythology and those are her realms. For more on Ma'at, try Pantheon.org.