Sense when is that Mary-Sue-esque? Jassi and Jissei are goddess of good and god of evil, respectively. I think they'd both be able to detect a level of evil so high as a being capable of incapacitating, draining power from and imitating deities.
And besides, it was only a suggestion. No need to get snippy about it.
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)