But under Aloof:
Aloof is a keyword ability. An enemy with the aloof keyword does not automatically engage investigators at its location.
* When an aloof enemy spawns, it spawns unengaged.
* An investigator may use the engage action or a card ability to engage an aloof enemy.
* An investigator cannot attack an aloof enemy while that enemy is not engaged with an investigator.
You don't necessarily have to be engaged with it yourself, but someone has to be.