Unit API
You can call getUnit() on a space to retrieve the unit located there (but keep in mind that not all spaces have units on them):
const unit = space.getUnit();
You can call methods on a unit to know more about it.
Class Methods
Here are the various methods that are available to you:
unit.isBound()
Determines if the unit is bound.
Returns
(boolean): Whether this unit is bound or not.
unit.isEnemy():
Determines if the unit is an enemy.
Returns
(boolean): Whether this is an enemy unit or not.