Holepunch's Mary Sue Litmus Test:
Ah, the Mary Sue. We can't cobble together a truly comprehensive description of what they are, exactly, but we can agree on one thing: an annoying, 'perfect' character who, through a general lack of flaws and character development, is excruciating to sit through and often makes us gnash our teeth, tear our hair, and reach for the back button. This nefarious creature can be measured and detected, so let's all grab our magnifying glasses and get classifying.
This is a subjective subject; a trait that drives one person right up the wall might fail to get any reaction from another. As you go through the list, c
France smiled seductively at your hunched over form, a lustful glint in his eyes. He had waited ages for this, and now he would do it. Nothing could stop him from having you. Nothing. "[Name]~" He crooned, slowly twirling the red rose in his hand. You looked up from your flower garden, your [e/c] eyes blinking rapidly. "Yes, France-san?"
"Would you like to taste my milk?" He asked innocently, lightly thrusting his crotch forward.
You blinked once more, an innocent smile spreading across your face. "Why thank you, France-san," you said, standing up and brushing the dirt off of your pants. His smile grew wider, his eyes darkening even more.