Whenever I associate elements to myself and objects, I choose both water as well as fire. This is because I don't believe our personalities are all truly 100% matched with one astrological sign.
My sun sign is Cancer and my rising sign is Sagittarius. For today, I chose the Chariot (water card) as well as the Knight of cups (water & fire)
The Chariot is the card associated with Cancer's specifically. There is a longing to be free and fruitful, as well as determination in seeking security.
The suit of Cups represent water and the Knight also represents fire within the court cards. While fire and water are opposites, there is still some resemblance of balance. Fire (masculine) & water (feminine) -- water can put out fire and fire can influence the creativity and feelings of water.
This combination is perfect to describe me really I used to be intimidated that I had a rising fire sign, but when I sat down and thought about it in depth like this, I understood. Now I love both parts of myself equally. :)