My character...

Draining Field is a fun ability in DB Xenoverse, and thats basically what Void Shield is, just with a name change.

Void Siphon is a way for her to beat regenerating world busters like Cell / buu / ext since she can't just hit them with a giant energy blast and vaporize them. 

With no numbers, its hard to say what the rate of her abilities / her drains would be.

if she was a Majin, she probably wouldn't change much, besides losing the metal weakness and gaining the rubbery body and candy beam, making her more powerful. the idea behind that weakness was to make her a threat to the big bads, but a Mr. Satan would beat her pretty soundly or somehting.