Undying Devotion

You and Cass grew up together, you were both raised by Cass's father. Only you weren't his child, when cass ran away they made sure you couldn't do the same. They kept training you to be better then Cass, learning you everything they knew. They made you think Cass was a bad person, that she had to be stopped. Once you were finally ready to take her out you started to stalk her to pick out a time to go after her, but is she really that bad as they say...?