We have a
third banshee as well~
On natural ability... I would say that it reads as literally death note shinigami, if mostly because you call it shinigami/how it is defined. Perhaps just changing a bit around to something like 'Death premonition'.
As far as her seeing 'death' in relation to halloweeners- they technically 'die' in a sense a whole lot given how they dissipate/reform on a pretty common basis in some ways. And when they can live over what could possibly be... hundreds and hundreds of years... They don't so much die as they fade or simply choose to stop existing. This information is kind of hard to find but I think it bears thought due to how your girl is centered a bit on her ability to 'see' dates of death.
A few things seem less like personality and more like quirks (such as strength, singing, getting lost) I'd scoot them a little further down to help better identify them, and a small thing, ghosts are not really 'strong' as a race so I might suggest making not of how strong she is in relation to say, a monster, another type of ghost, an undead ect ect. I also will suggest giving her another virtue on a whole though, just to make her a bit more balanced.
Other then the things I've mentioned its a really good profile, and I hope you'll join up with RPing her in the event!