While not much of the outside has been shown, the inside has shown two rooms. The first room is a grand entrance hall, shown with pillars lining the walls with stained glass-like windows above. The entrance hall is also marked by a large double door entrance with the planet insignia above it. The castle also possesses an office of some sort, though the room is scarcely decorated. Of note, the castle as shown so far has little in the way of guards.
The Hunter of Fenaur
Fenaur Castle is seen for a brief time at the beginning of the comic. It is here that Iris meets with Telari to receive his assignment to hunt Dezar.