Hey, you whimp! Thought you were imperceptible?
How imprudent! The Monster Lord's Castle is impenetrable!
Sneaking in is impolite. Don't try anything impulsive or you will be imprisoned!
Let me simplify it for you. Listen well, this is important.
I don't want to sound imposing or give you a bad impression, really.
The Monster Lord has implemented a policy that aims to improve our relationship with humans.
You know what that implies, right?~ I'll let you off the hook if you impregnate me!~
Now, let's get you out of that impractical gear. At least your "sword" is impressive...
Fufu, stunned by my flawless body with no imperfections, are we?~
I can't think of any more imp puns