Forgive me while I use this as an opportunity to talk about overpowered characters in more general terms. I'll give you a tl;dr just for you at the end, but I do think this is worth reading.

You have powers in this game, but it's not a game about fighting or power related pissing contests. We're here for an evil (?) lulzy time, so, no, Disgaea doesn't have game balance, and for the most part we don't intend to have it either.

But affecting characters with powers without permission is a form of god moding, and, while I do think that people should be fairly laid back about giving these permissions, those permissions are theirs to give.

But really, what's the worse that can happen? Death? Hospital cures it. Mind control? Have your character bitch about it later and we can all have a laugh.

Essentially the more powerful your character is, the more thoughtful you should be OoCly as a player.

To go all the way to the furthest end of a power scale possible, I'm not gonna say someone couldn't app God-Man, but there's a certain level of responsibility to keep in mind, and if a hard nerf had to be made, I wouldn't be afraid to do it. One thing we certainly won't accept for sure is House Of M level Scarlet Witch reality bending changing the entire game and everyone in it... except maybe as an event, and we'd have to think about it.



tl;dr : re Izanami
If you want a nerf, I'll give her one. If you want to kill people, I'd ask first, but given that death is cheap in the NW? It's not exactly a big deal.

I will say, though, that Izanami failed to kill Souji, who was still essentially a mortal man. In Disgaea, mortal men could survive this. (edit: I should clarify... some mortal men.)


P.S.
The Netherworld isn't quite the afterlife. It's where demons live. It just so happens that many human sinners come here after they die.