Lalande is the guard captain for the city Altair and Lacaille rule. She is a centaur, shunned by most societies. She is an adept fighter, but prefers not to fight. She carries the glass at all times on the job, it contained a captured faerie. If the city is ever under attack, she will break open the jar to let the faerie loose. This will signal the city.
The original design was by the lovey duo, here: