Yes. Both the Elfinkazi and its roost are
Active and can be attacked by
Units and
Spires. When
Attacking, including with
Spires during the
Spires Fire step, the
Attacking player may choose if they want to
Attack the Elfinkazi or its roost. Remember the Elfinkazi does have Flying, so it cannot be attacked by something without Flying or Air Defense. Elfinkazi share a
Hex with its roost, so the Elfinkazi and its roost are both
Adjacent to the same things at the same time, but the Elfinkazi and its roost are not considered
Adjacent to each other.