So, I opened my first 7* and was at first a little disappointed....

...however, it's my first 7*, so I'm not going to be too down about it! π
I've never really used her so don't really know much about her gameplay. Can anyone give me any advice on how to use her, or if she is great in certain aspects? Is she a good war defender?
I honestly don't know anything about her as I don't think I've ever had her above a 4*. Thanks.