The Cursed Mark on her left leg is from one of her families enemies a very powerful one, it makes her forget her immediate families names and weakens her since it has Dark Magic infused in it. She is weak to dark magic and is scared of enclosed places.

This mark only appeared once before and that was in her last school. The Cursed Mark also weakens all her 'family' heirlooms healing ability to make any 'injury' so intense that it makes her faint. The Pulsar Dragon Cloak, her natural magical essences and her Pulsar Dragon Necklace; what it weakens though the Pulsar Dragon Necklace is a very powerful artifact from the Tetra-Lira family.

As well, it lengthens the time frame she stays in her human form. Keeping her from freedom of her injury on her right leg. Since the Pulsar Dragons do not share injuries from their human selves and the opposite is true, aka mainly if her dragon form gets an injury her human form does not get it. Since it makes her forget the saying she needs to say, to become her draconian form.

The Pulsar Dragons as a whole are born as a human first and a dragon second most of the time, that's why they must use a piece of jewelry to turn into their draconian form. That means, they aren't born from eggs. Also that means, Patricia does not know why she has that mark at all, no one really does, expect for her old headmaster.