The sole dude of the elite four is growing on me quickly. Aside from being mellow, he's quite intelligent and reasonable, even going so far as to consider proposing a truce with Sachiku. Looking like Dracula from Castlevania is another plus.
"She was defeated without even knowing it's weakness"
I don't know, I feel by the end of that she was painfully aware of at least one of that skill's weaknesses