I can't see Helena, the Helena I like, being willing to kill a teenage girl's father in front of her.
Now, why would you say a thing like that? It's not like Helena would know how much that could mess up an innocent girl or have any kind of empathy for a kid who thinks her father is scum right up until the moment his life is actually in question. And when was the last time you met a really passionate, dedicated teacher who actually treated teenagers with care and respect rather than bullying and threats? (Or... "cutting" accusations that they don't know how to cheat, or something, I guess?)
And on a totally unrelated topic that has nothing whatsoever to do with anything DC is doing right now, I'm going to go work on my Harrierverse a bit. -_-