The angle between your signs — the square (90°)
The square is the aspect of tension: you want the same thing at the same time, just not the same way. This bond never falls asleep. It asks you to pick your battles, and makes you both stronger when it holds.
Your elements — Water and Air
Air analyses, Water feels. One wants to understand, the other wants to be understood. A bond that asks for patience — and teaches you both another language.
Your rhythms — cardinal and cardinal
Two cardinal signs: you both start things. Plenty of initiative — and the question of who leads.
Your rulers
Cancer is ruled by the Moon, Libra by Venus. Emotion and shelter, facing desire and harmony.