Hilda Garde 3?

Two mistakes precede me, - 1 and 2.
A mistress who betrayed my master, - Hilda stole 2 when Cid boinked around too much.
Just one look at me,
And you'll see I was made after. - 3 is better than the others.
Use me and then you'll find,
I left all of my mistakes behind. - 3 is better than the others.