link Amethyst The Cat: lilás point siamese cat.
Amethyst isn't fully aware of all her flaws as they are apparently listed in the ancient Book Of Spellbinding which she guards- which is possible a flaw in itself since she doesn't fully know what they all are.
The flaw she is aware of is that because her power is Spell-Casting, when she is in a place of low energy its can be hard for her because she will have to supply all the energy from within herself instead of extracting some power from her surroundings.
Another flaw is that her powers require huge amounts of concentration and has to ignore distractions ^^