I mean, it would be stranger for her not to be since not only was she specifically chosen for her talent and fortitude, she was also tortured for 400 years as the strongest sword in the world. The emperors literally did everything to make her the strongest.
@Geohie I didn't read the rest of the story so I really don't know. Did she still face serious obstacles to overcome or she just grinded through them like it was nothing. The best stories have the largest of obstacles. If I remember the beginning correctly, she reincarnated into her past self with all her previous powers so she could take revenge on all those who wronged her. That sounds like a wee bit of a boring story. But I didn't read it so I really don't know. Did she have a huge problem she had to overcome pretty quickly? Or would I have to read through a bunch of revenge fantasies before the plot kicked in?