You most likely would have to build the souls with her. You can get only 1 soul in a fight. How you get it is you use the SP3, which gives you the counter, and it increases to 100 as you hit your opponent. Once it reaches 100, it converts to a soul. Or you could end a fight with a SP3, which might not be preferable always. The power gain from heavy, I don't know it works, but it seems like it increases along with your combo's.
Nothing tough about playing her. You should build the 5 charges. Opponent has more buffs? SP2 would kill them. Just a regular fight? SP1 is more than enough.
Her awakening is definitely a nice thing to have. But it's not like you can't obtain her fullest without it. Moreover, it depends on your opponent triggering buffs.
Comments
The power gain from heavy, I don't know it works, but it seems like it increases along with your combo's.
Nothing tough about playing her. You should build the 5 charges. Opponent has more buffs? SP2 would kill them. Just a regular fight? SP1 is more than enough.
Hope he/she helps you out.
Good luck!
And post a picture of your roster.