Disney doesn't have to invent things. They just need to be able to make a good enough presentation to get their case heard in court, at which point they can bury anything they don't like under titanic legal fees and draconian injunctions. Their legal team is all on retainer anyway, so it basically costs them nothing to fight lengthy and pointless legal battles, and usually keeps whatever they're fighting from being released long enough to effectively leave it stillborn.

South Park had it right: you don't **** with The Mouse.

You can generally use the same name for your character as another character in a different property, as long as there aren't a huge abundance of other similarities between them. As long as it isn't Disney. They are entire orders of magnitude more aggressive about the defense of their intellectual property than any other company, mostly because so much of it should be Public Domain and remains under their control only because of their extremely litigious nature.

they should just call her TSUNAMI!!!