[quote=@TheWendil]
[@Villamvihar]

I'm fine with this, though what power do you have in mind.
[/quote]

I am not one hundred percent sure yet; still brainstorming ideas. The possibilities that come to mind are the following two:

1) The ability to influence weather, more specifically the creation and cessation of storms and clouds. Her allies would be boosted in the areas she controls and suffer no ill effects from the weather. They would be able to see through fog, ignore heavy winds and such for example, as long as Wilhelmina maintains control.

2) An ability that lets her rescue her allies if they are in danger, probably something like a simulacrum of her appearing and pulling them aside in the last moment, or teleporting away with them to a safe place nearby.

Both would be appropriate for her myth; the first one because of the prominent role of the Cape of Storms and the latter because it is very much in sync with the mission the captain is given and how he is rescued by an angel at the last moment.