I'm a bit surprised that the big bad girl has such a long range detection.
It is usually thought that such power is meant for weak people. It is further reinforced by the fact she lives in a small flying island where that power is fully effective to protect her.

On the other hand, you could argue that she's so strong that this power works by itself and is a very basic function she can use anytime. Only her strong power makes it a long range, not her fears and the need to protect herself.

Other than that, not much to say except I liked Maso-Ruby like most...