[quote=@Guy0fV4lor]
[@King Cosmos] does anything that gets caught in your Villain's second mouth automatically get nullified in terms of hurting her?
[/quote]

Interesting question. I never really considered it.

I suppose I'd describe it as the appendage just being a normal physical limb up until the moment that she closes her mouth, at which point anything caught inside is instantly erased/digested.

So she could be hurt by anything she tries to eat up until that point. Technically she could eat a fireball but it would burn her and then disappear as soon as she closed her mouth.